Small Engine Idles But Dies When Throttle

So, threw my honey on the back and we went for a little ride, no problems. Start by stuffing a rag down the bypass inlet (small hole just before the throttle blade), to keep the solvent out of the passage. I have a 2006 yz250f that has sat since 2009. It has a one barrel carburator, and I have to prime it to get it to start. The computer now sees a wide-open throttle power demand and proceeds to cheerfully flood the engine while you're idling. Holley Carburetor: Idle and Transition Circuit Calibration Guide July 27, 2015 by Muscle Car DiY At the risk of sounding repetitive, let me say once again, that if you bought an application-specific carb, you probably are only going to need to do minimal adjustments to mixture calibration. The owner attempts to compensate for very low idle by raising the "idle speed" using the throttle plate stop, which makes the problem worse. Time to go, engine will not start unless I run the throttle up in neutral. Have ripped almost everything apart on the sled trying to figure it out Have spent hours on here readying. A quick way of checking your mixture is to let the engine idle for a few minutes and then apply a burst of throttle. as the throttle has. Small engine repair and lawn mower repair make great do it yourself projects. Recheck idle RPM. Need to ask and confirm before I go further with the carb, Is my mower issue solution the same carb fix as described in the video for a surging. I have an Einhell petrol strimmer which stalls on throttle or even when idling if you move the choke far from the fully on/open position. I have a very similar 5hp Briggs and Statton and used your video to put it back together after cleaning. 10) If the reading at idle is lower than normal, but the gauge needle fluctuates three inches on both sides of normal, your valve guides are excessively worn. When you start riding, do some very moderately for the first couple of minutes. I have a 90 HP Mercury (year 2000). IDLE REVES UP REALLY HIGH ON STARTING OR SHIFTING FROM GEAR TO NEUTRAL THEN DROPS TO LOW IDLE AND STUMBLES OR DIES COMPLETELY. after replacing the motor it will not idle,and stalls out when stopping, also noticed that the motor surges, when applying the throttle it will rev up,but it will try to die off unless you let off accelerator a little and reapply. If the engine dies as if turning off the ignition key, most likely the problem is a loose wire or bad connection either on the fuel pump circuit or throttle position sensor circuit. This is a 2005 Vento Triton R4 , it set outside for a year, I did the normal things, Dumped the gas , blew out the lines , cleaned the Carb, replaced the spark plug , but all it will do is Idle , as soon as I give it throttle it bogs down and dies. A vacuum leak on a fuel injected engine will cause high idle. Just my 2 cents!. It has new plugs and wires, new distributor cap and button, new air cleaner and fuel pump. Flow test carb to check jetting. I have a big bore cag engine when i twist the throttle it revs up then dies. But when i rev the engine, the rpm goes up and hangs for a couple seconds before slowly coming back down to idle. Solution #2: Poor idle quality can be caused by a vacuum leak. By giving the engine more gas when it is about to stall you are essentially compensating for too low and idle by increasing the throttle thus giving the engine enough fuel to stay running. It's function is to bypass the throttle blade in the intake and allow enough air to bypass the throttle blade to run the engine. The truck starts fine and idles fine but after about thirty seconds starts to puff white smoke. Discussion in 'Thumpers' started by DeadByrd, Apr 14, 2009. When I give it any gas it dies almost instantly. If the engine does not speed up, or quits, then it is too lean; richen the needle some more. Now, start the engine and adjust throttle screw to get the engine stable but as low of revs as possible (around 1. They are in a general most-likely-to-occur order. Weed eater stalls when given throttle This is a discussion on Weed eater stalls when given throttle within the Small Engines forums, part of the Tech Support Forum category. Park it over night, go out the next day, the battery is dead. Holley dominator off idle bog Naturally Aspirated - Uratchko Racing Engines Holley dominator off idle bog - Yellow Bullet Forums Yellow Bullet Forums > Technical Section > Naturally Aspirated - Uratchko Racing Engines. Clogged low speed and idle circuit. The engine's idle speed is controlled by how much air is allowed to bypass the throttle via the idle bypass circuit in the throttle body. Make no more than 30 degrees of heading change to locate the best landing place. Some vehicles with ETC don’t use an idle air control (IAC) valve or idle-up vacuum switch, but control engine idle speed using the ETB. Now the engine begins to die, because the engine idle memory is now gone. I can get it to idle, but once I drive a bit, it dies. When I backed out and let off the throttle it died again, and this time I had to give it a little throttle to even get it to fire. The engine has no problem jumping up in rpm when it is tapped but once the throttle is quickly released from being pressed quickly it doesn't return to idle it just dies or sputters and picks back up to idle. Evinrude that runs for five minutes at times, then just quits, may run more or less than that then quits. Lean symptoms - if the bike surges, carb spits when throttle is opened, exhaust backfires or pops when throttle is closed, or the engine has trouble idling down, engine needs a larger pilot or slow jet to correct. Maybe it is the nature of this engine, but I don't think so. A small engine can push around a heavy vehicle but you need to accept a loss in top end speed and have rear end ratio that doesnt put huge strain on it. Ok I have a 1994 GMC 1500 sierra 5. But an engine issue has arisen in a number of cars that could actually cripple all of that driving excitement the cars bring with them. But now I'm running into the same thing again after I shut it off. I wondered just how small my main jet was so I took my carburetor apart and removed the main jet. 2) Fast idle RPM incorrect (too slow) 2) Speed up the fast idle to factory specs. Feels like someone is on/off/on/off/on the gas pedal. Be careful when adjusting CO as a small turn of the allen screw translates to a large CO change. Need to completely disassemble the carb, clean it out and install a fresh kit. This will allow fast idle on cold start-ups and you won't have to "feather" the throttle for 2-3 minutes till it will idle on it's own. It will idle really good, then randomely die after like 40 seconds. I turn the key and the car starts right up, it idles a little fast, from I suppose a choke of some kind. Same thing if the car is in gear, and I blip the throttle for instance, rolling out of the burnout box the car will die. You should also check to make sure the spark plug gap is set correctly. When I try to pump the gas as its about to die it just turns off even quicker. All acceleration issues from idle to full throttle are caused by incorrect idle circuit mixtures. It should respond to load pickup immediately. What is often termed a throttle is also called a thrust lever, particularly for jet engine powered aircraft. Let the engine idle and quickly open the throttle WFO. They are now about 5 years old. SMALL ENGINE REPAIRSMALL ENGINE REPAIR 368 SMALL ENGINE TROUBLESHOOTING CHART Problem Possible Cause Solution Engine surges, will not 8. Most small gensets use a mechanical governor to accomplish speed regulation. The idle is stable and it revs cleanly when the car is out of gear with no load. Also, an engine with low compression will take longer to warm to normal temperature, and may need to be run at a high idle for an extended period to warm. Black fuel lines will degrade from the inside out. The Engine Start And Stalls Won. This weekend the engine just died when I put it in idle. Need to completely disassemble the carb, clean it out and install a fresh kit. Now remove the float hinge pin, the float, and the metering needle. A 5 HP small engine with the throttle all the way open without a governor is capable of turning around 6,000 RPM. as the throttle has. Once off choke and set to a high throttle it runs but every so often it splutters (as if it's running lumpy). Its been used all of 2 hrs!. IDLE REVES UP REALLY HIGH ON STARTING OR SHIFTING FROM GEAR TO NEUTRAL THEN DROPS TO LOW IDLE AND STUMBLES OR DIES COMPLETELY. That would probably be an EPC circuit failure. It idles fine, but when put into gear, stalls. Engine idles OK cold but not when warm. Rotate throttle counter-clockwise and hold against stop. If the engine easily re-starts, a simple idle speed adjustment will most likely take care of the problem. But as soon as I press the gas pedal it cuts off? I. How do we adjust an engine’s idle speed? In the past, adjusting an engine’s idle speed was easy. tag:typepad. The engine starts and idles fine, but when I throttle up it dies within 30 secs. This user-friendly system is truly automatic, eliminating levers and cables. While poking around in the dark trying to figure out what was going on, I pulled the PVC out while engine was running and it died. Air leaking ,into, your car—not out of it—can be a problem. Rough on idle, when I tap the throttle bike dies. For a steam locomotive, the valve whic. Go for full throttle and turn the engine off again and stop the motor. Rough Idle. When you let off of the accelerator (which you have to do sometimes!!) the engine will intermittently die. The service manuals for STIHL 4-MIX® engines outline testing procedures as well as special tools that are needed to repair the equipment. Find the answer to this and other Small Engine questions on JustAnswer We use cookies to improve your experience. A partial throttle opening creates manifold vacuum—let’s use a number of 15 inches of mercury (Hg). When taking on a no spark condition one needs to be patient and have an open mind. Be careful: most engine jams occur when the main jet is too small. When driving a vehicle with a small vacuum leak, you will notice that everything feels normal at higher speed or RPM, but runs rough when the engine is at an idle. It idles smooth but has this annoying diesel sound. But now I'm running into the same thing again after I shut it off. IT WILL RUN WITH THE. You can also try tapping on the ignition switch to see if you can cause it to stall. if it HAD proper spark (one with HEAT and not just high enough voltage to jump a gap and LOOK impressive),it would fire a plug gapped at. Engine idles OK cold but not when warm. With the engine running, the battery terminals should be at 14. Make no more than 30 degrees of heading change to locate the best landing place. I've held it open with a screw driver but no difference. I changed my oil due to the gasoline in there, now my bike will only startup with the choke, then it dies when given throttle. im having a bit of trouble with my engine on my most recent build. Normal idle, stalls as soon as I press the gas pedal I have a 98 Subaru Impreza. Turn the mixture screw back out until the engine idle smoothes out again, and then go out another 1/2 turn. But now, when I go out to start it, it will turn over, start, but will only idle, it will shut off when you give it gas, The quad will turn over (but slower), restart, but only idle, and once again, die when you give it gas in neutral. I have a big bore cag engine when i twist the throttle it revs up then dies. That should help stabilize the idle. So I wasn't suspicious of fuel pressure, then later checked it and I have a steady 10psi from the moment I turn the key until a few seconds after it dies so the fuel pump is good. Be careful: most engine jams occur when the main jet is too small. USUAL CAUSE There are many items that can cause the engine to miss or run roughly. Fuel has gummed up in the carby jet. To increase the idle air supply, one may drill small holes in each of the throttle plates of the center carburetor. Step 2: Adjust carburetor idle speed. After a few weeks, now it drives good, but then when i pull in the clutch to slow down, half of the time it will stay running perfect idling, and the other half of the time it quickly dies when pulling in the clutch and slowing down. Air leaking ,into, your car—not out of it—can be a problem. Put it back together and it should run great. When it is cold, say 30-45 degrees. With this problem, the scoot will start and idle fine because the main jet is closed anyways at idle. Symptom: The engine will not idle smoothly, or it stalls during idle when the engine is cold. I put a manual fuel shut off valve in my scooter, and if I ever forget to turn it back on, I get the same problem. 0 305 it dies in gear sound awesome in idle but dies have changed the tps,the EGR Vacuum Solenoid the Idle Air Control Valve , TBI Base Gasket,Fuel Pressure Regulator,Throttle Body Rebuild Kit,be for it went out as u would accelerate it would lose power now u start it it runs awesome and dies in less on gas u. Holley Dominator 2 Circuit Conversion, Should I File Transfer Slots Naturally Aspirated - Uratchko Racing Engines Holley Dominator 2 Circuit Conversion, Should I File Transfer Slots - Yellow Bullet Forums. Engine stalls when warm Rough idle, stalls, when engine warm. A 5 HP small engine with the throttle all the way open without a governor is capable of turning around 6,000 RPM. 5 liters TBI engines, the throttle body intake fuel rail pressure better be 14. The next thing I'd look at is system fuel pressure. 2002 Ford Ranger. Engine stumbles/stalls under heavy throttle. On two occasions now, I’ve come back to my car after stopping for maybe 10 minutes to find that I could start the engine, but it wouldn’t stay at idle without me holding down the throttle. Granted it is -40 out so I am hoping it is temp related. Dies when throttle applied. Note I'm talking about the idle speed adjustment, which holds the throttle butterfly slightly open - I'm not talking about the low speed mixture screw. The engine could seem to rev up and down on its own at idle, but it’s more likely that it will simply rev up abnormally and stay there at idle. It means THAT CYLINDER is too lean, and it doesn’t have enough gas to run properly. Not the tune I should say but the pins on the PCM. I prime it, start it with choke and let it idle, idles fine, hit the gas past 1/3 throttle it dies like it's fuel starved. When I try to pump the gas as its about to die it just turns off even quicker. Here's the problem. That is why it will only run with the choke on. My first thought was a clogged main jet. Once the ice buildup gets large enough, the opening of the throttle plate created by the idle speed screw is negated, and the engine stalls. I turn the key and the car starts right up, it idles a little fast, from I suppose a choke of some kind. It can be so bad it can stall the car or cause the revs to hang at a bad moment for that. Probably the most common problem that causes idle problems in multiport fuel injected engines is a carboned-up throttle body. For a steam locomotive, the valve whic. Starts and idles, but dies with throttle. A tachometer can be used to set it to specifications but there is no risk is just adjusting it to idle smoothly. Have had cary apart and cleaned. I'm not familiar with the terminology, but when I took the carb apart, after i removed the float bowl and the needle jet from the bottom, there is a brass insert threaded up into the bottom of the carb that the needle jet goes into that has a slot. If an engine idles slow when the throttle lever is held to the slowest position by hand, but refuses to idle down on its own, the following may be the causes: Governor spring tension too tight or out of adjustment. Things were looking up: I replaced the spark plug, cleaned out the exhaust, adjusted the idle / fuel screws, and even replaced the brakes (I can stop now!). The AAR on the vanagon is a common VW aircooled part, so you don't have to shell out the big bucks for one from a vanagon parts supplier. BUT, if I put the car in 1st gear and start to release the clutch the engine jerks and will stall if I don’t rev the engine and take off slowly. Flow test carb to check jetting. Clogged low speed and idle circuit. Problem is engine starts and idles fine but as soon as you give it gas it dies everytime. YouTube - Mustang runs bad, dies Car had sat for a month and was dead. STIHL MotoMix ® can be left in the machine during seasonal storage. When you transfer a carburetor from a small to a big block, the engine provides a different signal. Pplease help THank you Paul. Air can get trapped in a water pump stalls the pump and because automotive water pumps are not "air tight", they cannot always self prime. When bringing the engine only up to ~2K RPMs and then letting off, the engine revs down until it is almost dead. Manual adjustment of idle speed is NOT possible on modern vehicles. It's controlled by output signals from the ECM to open and close as needed to allow enough air into the engine for starting and idle operation. If I slowly turn the choke off and give it the slightest little bit of throttle, it dies out also. [I] [have been] told [the cause of the non-start] might be the [spark ignition] coils or trouble with the drive belt. For the record I bought the Smog pump new on Ebay motors for $200. At first , this combination was not 100% successful as I still had the 0. But when it is running as soon as I lightly press the throttle it dies and stops running. But a low or weak battery is the #1 cause of idle stumble and stall, or a start and immediately stalls upon idle down. Idle problems may originate in a worn out component, a failed part, or a blown gasket. This insures that the idle motor has the most range and is not operating near-open. STIHL MotoMix ® contains no ethanol and has a storage life of up to two years. A stock engine, or one that is only mildly built for street use, willhave high manifold vacuum at idle speeds. This is a discussion on Weed eater stalls when given throttle within the Small Engines forums, part of the Tech Support Forum category. If the engine easily re-starts, a simple idle speed adjustment will most likely take care of the problem. If an engine at idle begins to slow down and run rich, it is likely due to ice forming on the throttle plate(s), effectively making them larger and choking off the air. If I leave the choke closed it will run at full throttle, but very lean, so I am pretty sure it is a fuel problem. At best, it will run at half throttle, but never at peak rpm. I took it for a test drive and got around the driveway fine but at the end of my driveway is an uphill. Shindaiwa weedeater starts and idles but when I hit throttle it dies every time. The small engine repair place donw the road stated it only take a little of the ethanol "improved" gas to really screw up the piston and rings. At first , this combination was not 100% successful as I still had the 0. But as soon as I open the throttle, the engine starts to slow down until it stops. Now that we've mentioned the ECU’s tasks of maintaining engine idle speed, as well as maintaining a proper air/fuel mixture, let's talk about ignition. Misfires can definitely cause an engine to shake, usually in most late model cars a misfire will almost always be accompanied by a CEL (Check Engine Light) and misfire code. At idle, your engine is turning relatively slowly, let’s say 1000 rpms. The Scion and Subaru both use a. If the switch gets hit, the fuel gets cut (see (*) above). Outdoor Gasoline and Electric Powered Equipment and Small Engines - Lawnmower shuts down when increasing throttle - Hi All, I have a snapper riding lawnmower that is probably 30 yeras old. Solved: Craftsman leaf blower only runs at full throttle and half choke Discussion in ' Do It Yourself (Not Computer-Related) ' started by lexmarks567 , Aug 12, 2006. Engine dies when pedal returned to idle position. ) when I have the brake pressed and in park, it idles fine. Using a small flat-headed screwdriver turn the idle speed screw clockwise so as to increase the speed if the engine idles too slowly. Look and see if it has a fuel filter and carb bowl you can clean out. Skip to the section that applies to you: Engine Idle Is Too Low Or Stalls or Engine Idle Is Too High. You first have to re-tune the carburetor to match what the engine wants. 1) Readjust the pull-off or replace if necessary. My bike (04crf250) will idle perfectly,but when i give it gas it seems to be fine for about 2 seconds and then the revs drop way down or the bike shuts off depending on how long/much throttle i give it, and it wont start when the choke is on. The revs don't drop either when i'm shifting gears and pulling in the clutch in between shifts. To adjust the governor, you would loosen the screw on the bottom of the governor arm and push the governor arm so the throttle is wide open. If you're new to Tech Support Guy, we highly recommend that you visit our Guide for New Members. If the engine stalls when you let off the throttle, you may have to raise the throttle speed. Look at the 1940s and 1950s era full size cars that came with a relatively small straight six or even small eight. Air leaking ,into, your car—not out of it—can be a problem. The small engine repair place donw the road stated it only take a little of the ethanol "improved" gas to really screw up the piston and rings. Replaced the rectifier. I really appreciate the small features that this unit has that others did not. The idle is probably working fine since you said it idles. You can verify this by applying throttle then choke - which richens the mixture of course if the bog goes away then you have too lean of a mixture. I put fresh gas in it and kicked it over and let it run at idle for about 10 minutes. A tachometer can be used to set it to specifications but there is no risk is just adjusting it to idle smoothly. Seemed to be at exactly 1300 rpm there, which is good. Using WD-40 my engine idles much nicer. A lot of times it just dies, and you can check by listening to if the pump runs when you turn the key to the on position but not start the car. My friend suggested to try tipping on its right side and starting it. by Kyle McFadden. tag:typepad. Scoot idles but dies when opening throttle. Start engine and place throttle in the idle position. Cranking and Idle. 2 liter engines came with a rather lowsy carter bbd carburetor which of goes out fo adjustment. I really like the other than idle driveability but its not safe or enjoyable to drive as is, I have to catch the falling idle with throttle application to keep from being a traffic hazard. Never clamp the engine in a vice. Another scooter I accidentally made a small hole in the diaphram on top of the carb. Question - mcculloch mt 260cls will start and run on idle but just dies - 4D. When your engine starts and stalls, it is often due to standard maintenance problems. Components in the fuel, ignition, emission and other systems should work correctly. When your lawn mower or rototiller won't start or stalls while you're using it, the problem is usually fairly easy to solve, requiring maintenance of the spark plugs, air and fuel filters and the carburetor. During deceleration the engine sporadically revved high, then low for about 3 seconds and then idled normal. It may require bending a metal arm, or drilling and removing a cap to get at a stop screw (drill a small hole and thread a sheet metal screw in, this will press the cap out as you turn it in). You first have to re-tune the carburetor to match what the engine wants. Also note that I was able to get it to idle with the choke off after warm. Re: Engine idles fine,but DIES if you throttle it up? The proper plug heat range and gap are critical elements in all small engines, whether 2 cycle or 4 cycle. While in park or neutral, if I bring the engine up to ~3K RPMs, hold it for a minute and then let off the throttle, the engine revs down until it completely dies. Governed idle spring A governor system component that has a low spring rate that offsets some of the force from the speed sensing device to improve governor sensitivity at low rpm. I drained the gas tank replaced with fresh, and replaced the spark plug. Your gas tank cap is probably dirty and plugged, with it plugged it creates a seal, stopping the gas flow to the carburetor. That would seem plausible seeing that the problem occurred after a small amount of use just after a fill-up. As soon as I use enough air for the unloaded to kick in, it goes wide open throttle and dies. Weed eater stalls when given throttle This is a discussion on Weed eater stalls when given throttle within the Small Engines forums, part of the Tech Support Forum category. Check for missing vacuum caps or bad seals. With the engine running, the battery terminals should be at 14. When i start it with the choke on it'll run for a couple seconds then die. Now that we've mentioned the ECU’s tasks of maintaining engine idle speed, as well as maintaining a proper air/fuel mixture, let's talk about ignition. It's about all you can do to keep the throttle almost closed, but not depress the idle switch. putting a tablespoon of gas in the throat of carburetor, engine starts immediately and runs 2-3 seconds until tablespoon of gas is consumed Fuel blockage somewhere???? I am at wits end, I've never had a problem like this in all my years of small engines. At idle, your engine is turning relatively slowly, let’s say 1000 rpms. Engine became warm, idles at about 1500, and idles generally smoothly. It has a Stromberg WW on it. It closes at first when pulling and opens as engine starts and revs up then 8 seconds later it starts to close and the engine dies. Choke it a couple of time and it will re-start and run awhile, then quit. Start engine. 7L engine and the fuel filter has been replaced I cleaned the injectors out and put a new gasket on. If an engine idles slow when the throttle lever is held to the slowest position by hand, but refuses to idle down on its own, the following may be the causes: Governor spring tension too tight or out of adjustment. Goped sport - starts up and idles but chugs full throttle. you need the fast idle adjusted on the engine you may have idle set where it sounds fine in idle but not high enuff when dropped in gear. the engine will still start but still the stumbling. The gas is new, the oil is new and the air filter is clean. Once the terminals are shorted, turn the ignition to the ON position without starting the vehicle. after replacing the motor it will not idle,and stalls out when stopping, also noticed that the motor surges, when applying the throttle it will rev up,but it will try to die off unless you let off accelerator a little and reapply. 030 or wider and run great. These kinds of headaches make me appreciate diesels all the more since diesels aren't fussy about air/fuel ratios and there are no air/fuel "mixture" adjustments to worry about. Skip to the section that applies to you: Engine Idle Is Too Low Or Stalls or Engine Idle Is Too High. It's a Revo 2. My simplicity riding mower is about 10 years old and I have been fortunate that this is the first time I have had to tackle an issue with this mower and the Briggs & Stratton engine. then the engine is starved. The described symptom above, while it can be many things, is a classic example of trying to start an engine with low compression. They can answer questions for any Yamaha outboard model or horsepower. Cleaned the air filter and the oil. The O 2 sensor is out of the loop at full throttle and will not affect the way the car runs. When I give it any gas it dies almost instantly. Problem is engine starts and idles fine but as soon as you give it gas it dies everytime. Then if I give it any gas it immediately stalls. It will idle OK when i start it, but as soon as I give it gas to pull away, it will die, until the remainder of the fuel in the lines are used. IF i go from full throttle to idle, the sucker stalls. New battery, replaced round fuses with contemporary plug in fuses. The only resistance should have been from the spring and vacuum after the piece has been re-installed. When I put it in drive and take off it works only first gear. and just yesterday it would rev fine no problems then it all went to s*** and on an added note i havent driven the car i just start up my car let i. The engine starts and idles fine, but when I throttle up it dies within 30 secs. 6 F8 Idle jets and that was the magic combination for my particular engine. In combustion engines , idle speed is generally measured in revolutions per minute (rpm) of the crankshaft. A small throttle return spring on the carb can keep cable taught so there isn't that slack and play from one direction to the other. It starts semi-fine after adjusting the HSN a bit and idles smoothly, but when I give it enough throttle to get it going it just stalls out. It idles very smoothly with the screw all the way out, not touching the throttle at all. Here's How the Throttle Is Supposed To Work. The Engine Start And Stalls Won. My engine stalls or almost stalls when I come down to an idle. “Start-stop” technology shuts down car engines at stoplights to save gas. It idling could mean that it's sucking air, and can compensate at idle but not when the throttle is open. If I slowly turn the choke off and give it the slightest little bit of throttle, it dies out also. it dies or else slows down and runs at high idle. Adjust the idle speed screw to the correct idle RPM. Last 2 times out it was pretty chilly (and boat is stored in unheated garage) maybe the engine is a little tempermental but even when I let the engine run for a couple of minutes and then kicked it into forward gear the engine cut out. Use the correct size and pitch of propeller for your engine; refer to the "Propeller Chart" on page 16 of this. You can't let the car just idle, because the surge is severly aggravated if the car is in gear. If you're new to Tech Support Guy, we highly recommend that you visit our Guide for New Members. The miss usually follows engine speed and may be more pronounced when the engine is under load. Replaced fuel filter. I doubt this is part of the problem, but in removing the tank, I had to destroy the fuel level float. Discussion in 'Thumpers' started by DeadByrd, Apr 14, 2009. if it HAD proper spark (one with HEAT and not just high enough voltage to jump a gap and LOOK impressive),it would fire a plug gapped at. Basically, shell start up fine and idle around 1500-2000 rpm (full choke) but upon going to 1/2 choke or giving her any throttle, she dies. But as soon as I open the throttle, the engine starts to slow down until it stops. 1: my 02 honda 9. 9 dies after starting: 15: Honda 9. But now the auto fast stage seems a little fast (maybe not). Page 2 of 2 < Prev 1 2. Prior to my purchase the previous owner, a friend, said he cleaned the carbs. 5" AFR probably works ok in a stock cammed engine, but not with longer cams and lower cranking compression. When I take off the choke bike dies. To determine the correct powervalve, drive the vehicle at various steady speeds and. Pplease help THank you Paul. Components in the fuel, ignition, emission and other systems should work correctly. I have a 1997 Polaris Xplorer 500 that idles just fine, but will start popping and die if I give it any throttle. If I throttle up while starting its fine and as long as i am in gear it runs fine but when i come up into neutral the engine will shut off. Boat motor dies coming off throttle-gctid588941 08-20-2014, 01:41 PM As I'm bringing the throttle back pretty slowly when coming down to idle speed, the engine drops down low RPMs and dies. Unfortunately, these variables are all inter-related. Lawn Mower Troubleshooting and Free information, tips, images, on how to repair most small engine problems yourself, saving time and money. When i start it with the choke on it'll run for a couple seconds then die. You can tape a nickel to the cleanout tray lid where it contacts the switch to test. Using Carburetor to Check Engine Timing. - Answered by a verified Technician. No worries, give it a kick start, and it's purring like a kitten. High manifold vacuum, coupled with the downward slant of the engine, oil collects toward the front of the valve cover. It will idle really good, then randomely die after like 40 seconds. When i start it with the choke on it'll run for a couple seconds then die. It also revs really high when it's running and it doesn't die unless i give it gas. An air-governor uses the amount of air flow produced by the flywheel to change the throttle setting. The car can be driven gently and will accelerate very slowly at slight throttle. [original 780 on shelf]. Be careful: most engine jams occur when the main jet is too small. 9) If, when you quickly close the throttle after running at 2000 rpm for ten seconds or more, the gauge needle DOES NOT jump two or more inches above what it is at idle, your piston rings are shot. When taking on a no spark condition one needs to be patient and have an open mind. I put fresh gas in it and kicked it over and let it run at idle for about 10 minutes. 3) Check for vacuum leak. its a lawn machine mtd mower. NCV3 Talk General Discussions related to NCV3 Sprinters. How to Fix an Engine That Stalls While Driving Easy step by step guide on how to repair an automotive engine that has stalled or intermittently stalls while driving, this information is presented in order of popularity and pertains to most vehicles. Other than stalling when returning to idle the performance is outstanding; throttle response and driveability are impressive. Any time that I give it throttle, it shuts off.