If you pull the throttles it bogs and if you keep it pulled it dies. When the engine is cold and you take your foot off the gas pedal, the engine runs very rough and may even stall. Maybe it is the nature of this engine, but I don't think so. 4-MIX® Troubleshooting and Repair. Now, imagine yourself walking. Is your fuel fresh? Stale, untreated gas begins to break down after about a month. It should make your idle trim settings remain stable and constant again. 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. The 235 engine in my '41 stalls. Most Pro Saw Engines Have Three Carburetor Adjusting Screws: Idle Speed/Throttle Stop - This is the adjustment that controls how much the throttle valve (butterfly) stays open when the throttle trigger is released. Small Engine Troubleshooting. Seems like a fuel supply problem. If the engine will not idle on its own during this procedure, adjust the idle set screw on the throttle side of the carburetor until it idles correctly. Pierre Podevin. When i start it with the choke on it'll run for a couple seconds then die. You may have to register before you can post: click the register link above to proceed. It has new plugs and wires, new distributor cap and button, new air cleaner and fuel pump. Need to completely disassemble the carb, clean it out and install a fresh kit. 6) Now throttle back to idle; let the engine idle for a couple minutes. With the 102 once again fine rolling on the throttle, but when blipping the throttle fully open it immediately stalls and I just heard it backfire. An emergency landing into a 10 kt wind at a full flap stall speed of 35 kts gives you a survivable ground contact speed of 25 kts. ( or use wd40). The tiller starts fine, idles fine, but squeeze the handles and it wants to stall out. High manifold vacuum, coupled with the downward slant of the engine, oil collects toward the front of the valve cover. If the engine will idle but dies at full throttle the main jet in the carburetor may be plugged. Check idle, progression and wide open throttle, shut off engine. The minute I put it into gear, its starts to sputter a little (sometimes it dies). Lower Throttle Bore: Allows fue and air delivery during engine performance. It also revs really high when it's running and it doesn't die unless i give it gas. When i start it with the choke on it'll run for a couple seconds then die. re: signs of a failing etm and its relation to the maf sensor Post by evegreen » 13 Feb 2010, 17:57 Thank you for this post, it was extremely valuable and easy to translate for me(a total illiterate when it comes to car talk but I know my car). Goped sport - starts up and idles but chugs full throttle. There is a large “sucking” sound coming from the throttle body when it is warmed up. This will happen about 6 or 7 times until I finally retrieve the boat onto the trailer. However, when I am in the water and the engine is under load it stalls. 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. Now I have aquired a rough Idle and engine shut down on Idle, that I did not have prior to any work! I will clean the throttle body tomorrow. DIAGNOSE - ENGINE MISSES OR IDLES POORLY. Check the RPM gauge for the proper idle speed setting (minimum air). If the engine easily re-starts, a simple idle speed adjustment will most likely take care of the problem. The driver of the vehicle may be unaware of this problem, until the battery power is lost. Low voltage will cause stalling, rough idle, and/or hesitation. STIHL MotoMix ® can be left in the machine during seasonal storage. Idle adjustment is always done in forward gear,with the propeller fully loaded in the water. Spark plug, fuel, lines and fuel filter are fine. When you start riding, do some very moderately for the first couple of minutes. Here are the Symptoms of a Bad Throttle Position Sensor One of the more frequent problems with modern vehicles is a bad throttle position sensor (TPS). Have a Kohler SV540 that would not start. Re: Bike stalls when revved, but idles fine. This page is dedicated to the owners of these vehicles equipped with GM's dual point fuel injection (model 220 TBI). The engine will idle poorly, but it will still idle, and the car will lose a little bit of horsepower at full throttle. I have a 1997 Esprit that has an annoying problem. My engine stalls or almost stalls when I come down to an idle. hmm, i have a fresh engine and fully rebuilt Walbro carb, yet this sucker is giving me problems. If the boat only travels 10 or 20 feet and dies the engine is running too lean, unscrew the main needle one full turn and repeat this procedure, if it dies again, unscrew another full turn, and repeat. The screw adjustment (explained in the video) is used to fine tune this adjustment at idle speed only. Each year I change the plug & air filter, plus when I have finished using them I drain & run them dry. 6) Now throttle back to idle; let the engine idle for a couple minutes. I have a 1997 Polaris Xplorer 500 that idles just fine, but will start popping and die if I give it any throttle. 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. The condition may clear up on throttle tip-in. - When throttling up, the engine will idle at high RPMs for anywhere from 5- 20 seconds and then if not throttled back will quickly lose power and RPMs and eventually die. You can tape a nickel to the cleanout tray lid where it contacts the switch to test. The engine starts easily whether cold or hot and is ready to use immediately. As the engine cools and when the engine goes through the exhaust stroke, coolant is pushed into the combustion chamber. Reinstall the white plastic plug, WYJ IDLE ADJUSTMENT PROCEDURE (WYJ WITH IDLE SCREW) 1. Slowly and carefully place your hands over the carburetor throat. My check engine light does not come on when I turn the key on. I feel that its as soon as you try chucking pet through it dies. My truck idles fine but as soon as I give it gas it dies (2000 Ford F-350 Super Duty) when I started my truck it seemed to idle just fine but as i gave it some gas it fluttered. Gas powered weed (string) trimmer keeps stalling out when I give it throttle UPDATE PG-1 When I apply the throttle, the motor stalls out. 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. 7liter 350 engine, i replaced the motor,the other motor had 225,000plus miles. 45 F8 Idle jets in place. Holding throttle against idle stop, turn idle mixture needle clockwise (lean) and counter-clockwise (rich). Bike finally runs on the choke but runs like crap. 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. It seems as soon as I pull the throttle the engine dies. I had a nitro go in not to long ago due to a bad power connection. Problem is, ever since I owned the car, most of the time when I put it into reverse or drive, the rpms will drop significantly and sometimes it will stall the car(the car stalls a lot more easily when the engine is cold) from months of dealing with this I can tell you a few things. STIHL MotoMix ® contains no ethanol and has a storage life of up to two years. Stihl FS 56rc bogging down at full throttle due to clogged spark resistor Steve's Small Engine Saloon 633,440 views. It also revs really high when it's running and it doesn't die unless i give it gas. BMW G650GS engine stall/bad idle. 3l Mustang Runs Great, idles great, but stalls and dies when accelerating I also did a key on-engine running test and came up with the codes 411 and 167. Do not operate the throttle. Then it just started to run again. A key clue is that the issue gets better as the. (09/22/2005) By Annie. Attn: Stratoliner ISC high-idle issue (ref via TownsendFJR1300) If this is your first visit, be sure to check out the FAQ by clicking the link above. I have a 1997 Polaris Xplorer 500 that idles just fine, but will start popping and die if I give it any throttle. An engine that runs roughly when picking up load is set too rich. The tiny thing that keeps your car working, often falls prey to regular wear and tear, and therefore must be taken care of. It seems as soon as I pull the throttle the engine dies. Remove the air cleaner. 45 F8 Idle jets in place. I have a 2006 yz250f that has sat since 2009. High Idle I purchased a used Poulan Pro PP133 a few years ago and use it about 10 times a year. Really helpful video. Several incidents happen when coming to the stop light and I have held the clutch in completely but as soon as the bike come to the stop the engine will die even with the clutch held all they way in touching my handlebar. 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. Customer Question 1998 mitsubishi galant, manufactured fall 97. Anybody got an idea of what might be wrong?. Have a 1989 70 H. STIHL MotoMix ® contains no ethanol and has a storage life of up to two years. The engine is revving up and down when I come down to an idle. All acceleration issues from idle to full throttle are caused by incorrect idle circuit mixtures. 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. My unit will idle but when you hit the throttle, it dies. I talked to a small engine guy, he's 90% sure it has to do with the cheap ($10) aftermarket carb I bought. It is especially noticeable if your engine is already in need of a tuneup. An air-governor uses the amount of air flow produced by the flywheel to change the throttle setting. I tried starting it a couple more times and as soon as I hit the throttle it dies. 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. However in the case of vintage engines, only huge air leaks will result in rising and falling idle speeds. High engine idle can result from things like vacuum leaks, a dirty or faulty idle air control valve or potentially an improperly adjusted throttle stop. Put it back together and it should run great. The PCM monitors idle speed and operates a solenoid or small electric motor to move a valve that regulates airflow through the air bypass circuit. w/ 22inch blade. Checked TPS, IAC, throttle body sync, air temp sensor, air box, exhaust donuts, just to name a few. I have a big bore cag engine when i twist the throttle it revs up then dies. HOW TO FIX Trimmer that idles for a bit, then shuts off. Let the engine idle and quickly open the throttle WFO. My 1999 Mercury 150-HP OptiMax engine starts and idles great, but when [I] give it some throttle, [the OptiMax] cuts out and dies. The bike will idle fine with the choke on and off, but when you give it throttle it dies at a fourth to half twist. Turn the engine off and remove the air filter, to access the carburetor freely. its not uncommon to see a small amount of steam from the tailpipe when the engine is cold or on initial start up. An engine that runs roughly when picking up load is set too rich. When the gear is engaged the engine dies. Depress the trigger and check the acceleration of the engine. The PCM may not realize the throttle is at idle, and may give the engine too much or not enough fuel causing it to stall. Then when the throttle is twisted open the scooter gets a rush of air, but no extra gas to match because the jet it clogged so it dies. This insures that the idle motor has the most range and is not operating near-open. If this circuit fails line pressure should go to full at all times. Maybe it is the nature of this engine, but I don't think so. If you set the throttle to low idle and open the govener butterfly it idles up and spits gas back out into what would be the air filter box. But then I tried starting it and then when I step on the gas, it dies. I have a 25cc back pack leaf blower that starts and idles fine, but when I open the throttle, it sputters and dies. Checked for vacuum leaks. So when your vehicle's engine stalls when you kick your vehicle into idle mode, have a look at the idle control valve. Another scooter I accidentally made a small hole in the diaphram on top of the carb. The majority of the smaller, yet equally destructive, air leaks will have no effect on idling. Unfortunately, these variables are all inter-related. Acts like it wants to run but gets choked out. 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. when I let off the throttle then the RPMs just fall off. I don't know much about engines so maybe someone can offer me somewhere to check I have a snow blower that works just fine when the choke is on. Controls and Adjustments - Model-A Ford Carburetors. The throttle position sensor provides throttle position feedback to the ECM. Time to go, engine will not start unless I run the throttle up in neutral. Each year I change the plug & air filter, plus when I have finished using them I drain & run them dry. I think the main jet on the carb might have been clogged. With the 102 once again fine rolling on the throttle, but when blipping the throttle fully open it immediately stalls and I just heard it backfire. The rest position of the engine is when the engine is off. Bike hesitates when throttle is increase Bike runs jerky or surges at steady throttle openings Engine spits back or coughs through intake system Spark plug color is white. 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). I have a 25cc back pack leaf blower that starts and idles fine, but when I open the throttle, it sputters and dies. If your engine pulls 15"Hg but your vacuum advance doesn't max out until 20"Hg then you may have an unstable idle. hmm, i have a fresh engine and fully rebuilt Walbro carb, yet this sucker is giving me problems. While I have never locked up the rear in a turn or anywhere else for that matter I have noticed that under certain conditions, usually after a hard run when the engine is hot when you release the throttle and pull in the clutch the motor will seem to die, dropping to idle and not responding to throttle inputs for a second or two. it dies or else slows down and runs at high idle. Reinstall the white plastic plug, WYJ IDLE ADJUSTMENT PROCEDURE (WYJ WITH IDLE SCREW) 1. I was driving a 96td one day on the highway going about 60 when the engine just cut out for about 6 seconds. Thanks to SpyGuy, i got my bike back and running again, before it wouldn't start and his tips allowed my to get it up and running again, but now when i start my bike up, it'll run and then as soon as i go to give it some throttle, it dies. Stihl FS55 Trimmer Stalls at Full Throttle My Stihl FS55 idles fine but will stall at 3/4-full throttle. My fuel pump is real noisy. I've pull the fuel line off the new carburetor and let the fuel drain for about 30 seconds with the cap on tight. It can be so bad it can stall the car or cause the revs to hang at a bad moment for that. It seems to idle fine but whenever I give it the smallest amount of throttle is dies. Discuss 1990 TBI 5. 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. This is 1800 RPM for a 60Hz output on a four-pole generator. Why is the engine bogging under acceleration? I recently managed to get the moped running properly, albeit for only a short time. 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. They can answer questions for any Yamaha outboard model or horsepower. Skip to the section that applies to you: Engine Idle Is Too Low Or Stalls or Engine Idle Is Too High. The computer will then retard (back off) ignition timing slightly to prevent detonation (spark knock) that can damage the engine and decrease performance. Carbon is built up because the saw is idled for more then a few seconds at a time. Now start walking fast. The engine should start to run richly, and some smoking at the exhaust may occur. It may be hard to find, especially if it starts right back up. If one observes the throttle plates while attached to the throttle shaft, the throttle plate will appear as two hemispheres. At idle, the voltage from the sensor should be 0. However in the case of vintage engines, only huge air leaks will result in rising and falling idle speeds. 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. Very difficult to get an idle speed that works when decelerating (either revs high at idle. I have a big bore cag engine when i twist the throttle it revs up then dies. It seems to idle fine but whenever I give it the smallest amount of throttle is dies. This explosion can bend the throttle actuator plate, push intake gaskets outward creating a vacuum leak and even blown apart a plastic intake manifold. Test the engine under load. 2: Honda dies at mid throttle. I received it second hand as a gift, but it has only been used a handful of times. Choke it a couple of time and it will re-start and run awhile, then quit. Test the engine under load. It also revs really high when it's running and it doesn't die unless i give it gas. Mount the engine securely in a "bench mount" or high-quality motor mount. If it idles fine but it bogs down with throttle, your high speed gas jet is probably clogged. Yes, once its running and building pressure it runs great, builds to 120psi quickly then to idle. Turn the Lo screw in a hair and repeat the test. This may explain why the engine dies as you put the vehicle into gear as a load is put on the motor. For example, on Tecumseh TVS, LEV, TVM, TVXL and other similar engines, the governor arm rocks in the counter clockwise direction to close the throttle to idle. Idle speed (or idle) is the rotational speed an engine runs at when the engine is idling, that is when the engine is uncoupled from the drivetrain and the throttle pedal is not depressed. But as soon as I open the throttle, the engine starts to slow down until it stops. Clean your carb and spray carb cleaner in all small passages, make sure air can flow through all ports no matter how small. The first problem was that the fuel cap for the small outboards up the the 4hp has an EPA approved cap with air vent. 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. I ordered parts BUT while waiting I put 2 ounces of REGANE in fuel - stirred it up with metal rod and then kept twisting the throttle - and suddenly WHAM it roared into life - I put two clockwise twists on the idle screw and everything is now back to normal with great idle and nippy running engine. The controlled idle speed is programmed into the pcm and the correct IAC position is determined for all engine operating parameters. The power control module or PCM now determines the speed at which an engine idles, based on several input-sensors. that will drain all the gas inside the carburators and if you have water inside will come out too ( let them to drain for minimum 5. Now, imagine yourself walking. the tranny works reverse, neutral, and first. Don't see your answer here? Try our FREE Tech Support Forum. Get a starting fluid or ether and spray into the carb or the throttle body on an EFI. i had my bike out the other day and it ran like normal. Also when sitting at a stop sign or just sitting idle, the engine would stall, and often times Dodge Ram Failed Smog Test for Incomplete Monitors. Going back to high and the engine will die unless I choke for a second before going to high. A faulty mass airflow sensor will cause problems similar to low compression or low vacuum, and will also show symptoms similar to when your vehicle has low fuel pressure from a faulty fuel pump. It was a "107", which means the diameter of the hole in it was 1. 0L) and LO5 (5. The owner attempts to compensate for very low idle by raising the "idle speed" using the throttle plate stop, which makes the problem worse. Recently, I cleaned it up and drained the old gas out of it. it idles the dies when i twist throttle. The same thing can happen if the throttle position sensor on a speed/density EFI system (no airflow sensor) is out of calibration or had a dead spot. I tried starting it a couple more times and as soon as I hit the throttle it dies. In addition to the mods you mentioned I would make sure the carb has a hp needle/seat (at least. 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. The last couple of times out it has idled pretty rough and cut out a few times while at idle. The idle is stable and it revs cleanly when the car is out of gear with no load. I have a strimmer & hedge trimmer, both driven by a 2 stroke petrol engine. 5r that I just got about a week ago which I purchased used. Pressure needs to be at least 55 PSI. A lean fuel/air mixture will cause the engine to overheat fast. It revved terribly slowly and if I gave it any throttle beyond about 1/3, it would immediately die. Troubleshooting a Surging Engine If your engine is surging or running unevenly, chances are that something is wrong. If the engine idles but will not increase speed with throttle, a damaged diaphragm is likely (or your throttle cable is broken). Car runs fine when cold, but if left idle, once warm, idles extremely rough, and dies out when attempting to drive after warm up. What is often termed a throttle is also called a thrust lever, particularly for jet engine powered aircraft. 2 stroke idles all day but won't rev !! Share Thread. The fan belt can loosen over time and when you start your engine and the fan belt (often called the serpentine belt) can squeal when the rubber teeth underneath it start to drag. Got a problem you can't fix? Post here and one of our members will answer as soon as possible. I cleaned the carbs, changed the spark plugs and gave it fresh gas. Many people have experienced this problem, even while the battery was still easily starting the engine. But as soon as I open the throttle, the engine starts to slow down until it stops. If the engine will not idle on its own during this procedure, adjust the idle set screw on the throttle side of the carburetor until it idles correctly. There are also many sensors such as the throttle position sensor (non-turbo's), the output speed sensor and the crankshaft position sensor that will cause a hard or no start condition. As in, an apparent "13. They both start but as soon as they get hot they die. 1: adjust the gap between the contact & the magneto, 2:Or adjust the space on the tip of the plug. I have been fiddling with the governor linkage on the engine for some time now to try and get it working properly. The engine starts and idles fine, but when I throttle up it dies within 30 secs. Discuss 1990 TBI 5. 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 miss usually follows engine speed and may be more pronounced when the engine is under load. I have a big bore cag engine when i twist the throttle it revs up then dies. It just dies, as if the bowl had run out of fuel. Thinking I had a fuel problem from winter storage, I drained the fuel, changed the fuel filter, filled the tank with new gasoline and added about an ounce of Gum-out, but it hasn't helped. 7 Idle surging,stalling in the alt. Probably the most common problem that causes idle problems in multiport fuel injected engines is a carboned-up throttle body. I ran a carby kit through it and installed it back onto the engine. Josh Freeman. 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 idles the dies when i twist throttle. Timing that is more advanced at slightly lower engine speeds than idle is sometimes used to help stabilise idle. But then I tried starting it and then when I step on the gas, it dies. It idling could mean that it's sucking air, and can compensate at idle but not when the throttle is open. It has very little or no effect on off idle and larger throttle openings. 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. 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. Acts like it wants to run but gets choked out. Be sure that the throttle body walls and blade are clean. I then turned off the engine and just turned the key on and could hear some kind of electrical almost a static-like sound coming from somewhere very near the alternator. The only cool thing there is the engine, and a cool engine doesn't run well (or lasts). Now, imagine yourself walking. Stalling when it's cold can also be caused by a fuel leak problem inside the carb. They would idle all day but die if you hit the throttle. I cleaned the carbs, changed the spark plugs and gave it fresh gas. Even without the engine running, when you let off the gas by just relaxing your hand on the handlebars, the throttle return rate should be that of slamming shut in a way that you can hear the throttle tube on the handlebars hitting it's stop solidly and crisply. 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. Each year I change the plug & air filter, plus when I have finished using them I drain & run them dry. Drop float bowl, with the use of a very, very small drill bit, clean out the pick up metering jet. I have checked vacuum lines and found no cracks. That would probably be an EPC circuit failure. There is a black plastic piece that is the topend of the butterfly valve that rotates and hits a low idle adjustment screw and at the high end another plastic piece that looks integral to the top. A quick way of checking your mixture is to let the engine idle for a few minutes and then apply a burst of throttle. Run the equipment only at idle speed until the engine stops!) STIHL recommends the use of STIHL MotoMix ® fuel which is pre-mixed with STIHL HP Ultra synthetic oil. A lean fuel/air mixture will cause the engine to overheat fast. A vacuum leak on a fuel injected engine will cause high idle. Many premium 2 cycle engines do not have a vented cap, rather a remote tank vent. If it races when u spray a certain area that's the issue. Learn about this problem, why it occurs, and how to fix it. Yes, once its running and building pressure it runs great, builds to 120psi quickly then to idle. up and down on engine speed. It idles smooth but has this annoying diesel sound. Checked for vacuum leaks. High Idle I purchased a used Poulan Pro PP133 a few years ago and use it about 10 times a year. small engine stalls when hot General Questions. Probably the most common problem that causes idle problems in multiport fuel injected engines is a carboned-up throttle body. 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. Why is the engine bogging under acceleration? I recently managed to get the moped running properly, albeit for only a short time. , 1/8th turn) and test again. 3) Check for vacuum leak. I THINK YOU STILL HAVE A CARBURETOR PROBLEM BUT FIRST REMOVE THE MUFFLER AND LOOK FOR A SCORED CYLINDER OR PISTONIF SCORING SHOWS UP, IT IS UNREPAIRABLE ECONOMICALY. Replaced battery and was hard to start then ran for a. If the tray is not locked down or a switch is not correctly adjusted it can kill an engine when you throttle up. Engine Runs Rough, Stalls, Hesitates on Acceleration, Hard Starting, Poor Performance Problem Description If the engine runs rough, stalls, hesitates on acceleration, is hard to start, or has generally poor performance, this can be caused by a cracked or broken air inlet tube. Check for missing vacuum caps or bad seals. Again, this is one of those things that you can't really test for. Seems I should have rebuilt the 235 and not let the old man talk me into the small block!!!!!. Idle Operation with Low Intake Valve Lift in a Port Fuel Injected Engine. 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. The system can be put on simple terms. Problem is engine starts and idles fine but as soon as you give it gas it dies everytime. Prior to my purchase the previous owner, a friend, said he cleaned the carbs. If the boat only travels 10 or 20 feet and dies the engine is running too lean, unscrew the main needle one full turn and repeat this procedure, if it dies again, unscrew another full turn, and repeat. Try checking the ignition and the governor. Drop float bowl, with the use of a very, very small drill bit, clean out the pick up metering jet. I cleaned the carbs, changed the spark plugs and gave it fresh gas. Problem is engine starts and idles fine but as soon as you give it gas it dies everytime. Here's how to get it fixed. Car idles great when in park & idle and even in gear. If you get engine stumble then you have bad wiring inside the insulation. I've pull the fuel line off the new carburetor and let the fuel drain for about 30 seconds with the cap on tight. The bike only has 5300 miles on it and has been serviced regularly. If the ISC valve is gummed up with fuel varnish or dirt, it. Engine stalls when warm Rough idle, stalls, when engine warm. Troubleshooting a Surging Engine If your engine is surging or running unevenly, chances are that something is wrong. When it dies, when i go to start it, when i pull the pullstart it jerks foward and i have to run with it and start it up at the same time. Run the engine until the fuel system is dry (Warning! Do not operate the throttle, run the equipment only at idle speed until the engine. Double-check those circuits, including wiring harness and connectors. Now turn the mixture screw outwards (counter-clockwise) until the engine begins to run smoothly, then add 1/8 of a turn. This is a discussion on Engine stumbles/stalls under heavy throttle within the General Help forums, part of the LSx Technical Help Section category; Driving back from the beach, car would "buck" when giving more than gentle throttle. The clogged gas tank cap baffled us all but the collapsed gas tank pointed to a clogged vent somewhere. 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. When a car dies at idle, the last thing that drivers think of is a problem with the spark plugs. The term throttle has come to refer, informally, to any mechanism by which the power or speed of an engine is regulated, such as a car's accelerator pedal. Just get a small can. This page is dedicated to the owners of these vehicles equipped with GM's dual point fuel injection (model 220 TBI). OK, so I've got my engine idle portion tuned well in my opinion. Hello, I have a 2000 honda recon manual shift. If the engine stalls when you let off the throttle, you may have to raise the throttle speed. I don't know much about boat motors, so I am drawing on my knowledge of car. This time pinch and hold the line. 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. I then changed those up to 0.