It depends on the model of the strimmer and what the screw is actually for. use carb cleaner on throttle. If the engine dies while idling, the idle adjustment needs to be tightened. 1 Color Line it has a " TU1/K" engine with a single Solex carburetor ( Solex 32 PBISA 12 ) the car was purchased new in italy in 1991 but it was actually imported from france by the dealer. Acceleration Misfire. Idles ok, dies when increasing throttle discussion in the Ford 9N, 2N, 8N forum at Yesterday's Tractors. Honda civic 92 - engine dies when idle [ 4 Answers ] Hi, I have a Honda civic, 92 model, with manual transmission. First, may I suggest you download a copy of the free e-book "Secrets of Nitro RC Cars. Carb Accelerator pumps came about in automotive to alleviate hesitation. The idle is stable and it revs cleanly when the car is out of gear with no load. Older cars without idle control will suffer from a fast idle, which suggests the leaks is past the throttle and near the carburetor or throttle body gaskets. I have a 2006 yz250f that has sat since 2009. In order to truly tune my carb, I want a better understanding of the symptoms of lean vs the symptoms of rich. They would idle all day but die if you hit the throttle. initial drop and go on to maintain 200-1000 idle RPM and doesn't turn off. However, your car ran and seems affected everywhere, not just during high flow situations. vacuum when idling. Seems like when the main jet. I have a 1996 Jeep Grand Cherokee Limted (5. "Carb Settings for Homelite XL" accessed October 30. I was riding and when I stopped at a light coming off the highway it stalled, it will start and Idle but given any throttle it stalls-the manual says it could be the 1) automatic choke or 2)ignition malfunction or 3)carburettor malfunction or 4)bad gas 5) inlet air leak -check for loose carb to inlet manifold connection or loose carb top or 6) incorrect engine idle. After the car warms up when at a stop light it stalls and dies. now the car starts easily, but won't idle. Mind you, I have no experience with bikes and just started riding in June. As soon as the engine catches and the ignition key returns to the Run position, spray some carburetor cleaner into the throttle body. What causes a car to idle fine but dies when put in in gear because of a problem with the carburetor or the bowl. initial drop and go on to maintain 200-1000 idle RPM and doesn't turn off. Pull the starter & it starts and will idle in or out of gear. use carb cleaner on throttle. 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. The idle speed is controlled by the center carb only. An old mechanic’s trick to check for such a leak is to use a spray can of carb cleaner and a straw. If the engine dies while idling, the idle adjustment needs to be tightened. When I give it a little gas, the engine dies. Removing the air box. I would recommend cleaning/rebuilding all three carbs so you can tune them successfully. 5 when engine is on. Clean throttle bore and idle air control motor thoroughly using sensor safe carburetor cleaner. I have a brand new Holley 4150 carb and I can not get the idle down. A competent carburetor rebuilder may be able to re-bush the throttle shaft bore. I ended up just driving it around till it would idle and then letting it idle in the driveway for about an hour. When the throttle/brake servo is in the neutral position, the carburetor should be in its idle position. It starts fine. by Had Robinson updated September 17, 2019. 00 part that is replaced by removing two screws. Carburetor problems generally fall into three areas: too lean a mixture, too rich a mixture, or an incorrect adjustment. This seemed to help very slightly, but ultimately, it still stalls out every time. These adjustments will control idle speed, idle quality, and initial responsiveness/ acceleration of the engine. Removing the air box. If I put my mixture screws about 1 turn out , the car will not run, it dies, and I go crazy lean. I have noticed the car will run longer with some throttle than at idle. When you give it throttle it's dying out because you're getting into the main jet circuit which handles from about 1/4 throttle to WOT. I mean really jam it, maybe less than qtr second. Check for missing vacuum caps or bad seals between the carb, intake, and cylinder heads. (93' GS500E Hey guys, i recently blew the engine on my gs500 and bought/ installed a used one from the same year bike. With todays fuel, it's almost manditory. If the idle changes, or smooths out, then you. When they blip the throttle, it will come back to 800. I have replaced the fuel filter, air filter, rebuilt the carb (Walbro), new spark plug, decarbonized the exhaust port and removed the spark arrestor. Witch you would expect due to better flow. Dies when you hit the gas If the bike idles normally but won't rev up, it's likely the idle jet is fine but the main jet is plugged. Fast forward several years later and I start getting a miss off idle, and it spits and sputters but will usually run well if you hold it to the floor, but part throttle it's a bear to get this thing to do much. Troubleshooting Your Holley Carb August 2, 2017 Wayne Scraba Fuel Delivery , How-To and Tech Tips , News 1 Holley carburetors find their way onto countless vehicles, from race cars to hot rods to delivery trucks, and for good reason: They're the standard of performance, and without question some of the most popular and easily tunable. runs great. now the car starts easily, but won't idle. I installed a new battery, a new spark plug, cleaned the carb, drained the gas, cleaned the gas tank, new fuel filter. They are difficult to tune and give many people many issues. To diagnose the problem, disconnect the linkage at the carburetor, and manually move the throttle with the engine running. Re: 1982 Corolla 3TC idle problem PS. Nitro Engines Database. Bike idles perfect, but dies when given the slightest amount of throttle. I replaced it and the car started and ran great for about 10 days. However, if I try to give it any throttle at all it dies. For a while everything went well, but after about 2 months the motor would snuff and die. If it starts, the fuel pump is the problem. Thinking back at your original post, where you said you drenched a rag with cleaning fluid and cleaned the throttle body, that extra fluid is probably what made your car stall. will idle but dies when try to accelerate. Once it cooled it would run ok and after the days riding we took it to a car wash and ever since then it will idle and run at about 1/4 throttle but any more it just bogs and then dies. The bike hasnt been running to my knowledge for 4-5 months. Take the carb apart and make sure it is assembled correctly and the metering lever is set right. Holley type carbs come with a standard shooter size which differs by carb list #. Viper stalls/near stalls while idle Recently say I've come to a stoplight and sit there for a bit, the car either idles very low coming close to stalling (until I rev it a bit), or a few times it has stalled on me. The Idle Air Control valve ("IAC") generally makes the car run like crap at all speeds. Proper Air Intake Metering. First check to make sure there are no big holes in the air tube between the mass airflow sensor and the throttle. highperformancepontiac. One i get the rpm up using primer bubble, hit the throttle, i get about 2 seconds of full throttle, then dies out. Ok, I'm having a really weird problem that REALLY sucks. cleaning the throttle body with spray cleaner My car stalls at times. If attempts to turn down the idle speed adjusting screw have failed (old-make carburetor), it means the blend of air to fuel ratio has changed in favor of too much air passing into the intake manifold. The car will idle fine because it is running off the slow jet, but once the accelerator starts being pressed down and opens up the throttle valve, all the engine sees is a big vacuum leak minus fuel because it can't suck any fuel out through the primary fuel circuit. Basic Carb Adjusting Procedures/Guidelines - Timing can affect performance. Never set the idle so the chain runs when the throttle is. Try to start the car for 2 seconds. What causes a car to idle fine but dies when put in in gear because of a problem with the carburetor or the bowl. I fired the car and loved the sound but I noticed It idled higher out of gear more-so than with the replacement exhaust. I was riding and when I stopped at a light coming off the highway it stalled, it will start and Idle but given any throttle it stalls-the manual says it could be the 1) automatic choke or 2)ignition malfunction or 3)carburettor malfunction or 4)bad gas 5) inlet air leak -check for loose carb to inlet manifold connection or loose carb top or 6) incorrect engine idle. Trimmer: Engine Will Idle But Dies At Full Throttle. Re: Mercruiser 3. Clean it thoroughly and then take it on a test drive. Solving Intermittent Stalling Problems Download PDF. Richen the LSN one hour or until the idle drops to normal. Try increasing the timing 2 degrees. I took the carb out and cleaned it best I could, the jets seem to be clear. It's still doing this-will start up and idle fine, but press the gas down anymore than 1/5throttle it dies. And if i repeatedly press the primer bubble, it will rev up. Kawasaki Jet Ski Carburetor Issues. You'll hear it prime if it's working. I rechecked dwell (ok at 50°) and timing (30° BTDC at 3000. Also look for. I got the engine timed to the 6 before TDC GM spec. Usually I would suspect main jet or air screw, but jet is new and I can run the screw both directions to no avail. The car idles smoothly at 900 RPM in Park or Neutral once its warmed up. 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. Average failure mileage is 73,600 miles. A bit of rubber melts, comes loose and travels to the carb. Until that is relearned, idle speed will be too low and can cause a crank / no-start, a long crank time as you described, a lack of "idle flare-up" to 1500 rpm at start-up, and a tendency to stall at stop signs. Replied by barneyb on topic Rochester 2BBL carb-Idle issue College man writes, "check the choke settings when cold". Thanks for the quick reply. Thanks for the responses! ill do everything that was posted!. You can spray carburetor cleaner around the mounting plate and the throttle body. I rebuilt the zama carburetor on my old homelite ST185 trimmer, and thought I had it fixed. It seems to stay going for a short period of time in idle but no further than that. 2L V8) and if I dont keep my foot on the gas the RPMs immediately drop to zero and the whole car dies. The fix for me was simple. It's like a whole new car. I'll check over everything again when I get home this evening, just trying to see if there is something I really need to look at. It seems to idle fine but whenever I give it the smallest amount of throttle is dies. The PCM directly controls an engine's idle speed by opening and closing the throttle. gave it some gas sitting there. From the factory, most of these atv's are what I call "De. The engine is a 1969 350 chevy. Then a short time later his original 305 blew on him so he bought a 350 from a salvage yard and asked me to help swap it out. You may get "hunting" or unstable idle speed, especially when shifted into gear. It consists of a piston or diaphragm and a spring-closed check valve. Jabbing the throttle avoids stalling. and i would assume its getting spark since i replaced the spark plugs and a bad coil and the car idles fine. Pop in the 90, much better compression, started first kick! But giv it any throtte and it dies, even the slightest. stihl hs 45 hedge trimmer starts & idles, dies with throttle. the IAC port and throttle body good with carburetor cleaner, and replace the base gasket. Causes of a rough idle. It was an adjustment of the throttle cable. 5 Common Causes of a Car Starts then Dies. when turn throttle up on carb idles to high. Well my car has been recently stalling about once a day when im sitting at a light for example in neutral i had a full tune up done not too long ago, new MAF, only have an intake installed, and just had both my o2 sensors changed today. 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. Starts and idles, but dies with throttle. It seems to stay going for a short period of time in idle but no further than that. Hand feed gas to carb when. However, your car ran and seems affected everywhere, not just during high flow situations. throttle locally at the carburetor instead of from the gas pedal. How Does An Engine Idle? Many of us petrolheads like to simply stand back and listen to our cars ticking over on idle, but how does the engine keep running without any throttle input?. If it starts, the fuel pump is the problem. Now including HGTV, Food Network, TLC, Investigation Discovery, and much more. When I take off the choke bike dies. I own a 98 626 2. Ever since Dave purchased the car it has been plagued off and on with what we have come to call a "hesitation" problem. 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 car is a 1985 535i and was apparently the daily driver of the kid I got it from for several years before it sat for the last 6 months. Here is what is happening. If you tighten the screw, the idle rate will speed up (it will push the slide back opening the neck of the carb) if you loosen the screw the idle rate will slow down (it will let the slide close off the neck of the carb). Then again, I twist the throttle, some gas gives, but then it dies again. If it starts, the fuel pump is the problem. 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. Replace it if it's not new. Dirty fuel injectors. its a 2000 AC 90 it runs, but when ever I hit the throttle it just dies. Technical assistance is free for the first 60 days of purchase. 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. Well, just finished installing my KA-T stuff and all went well. 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. Thinking back at your original post, where you said you drenched a rag with cleaning fluid and cleaned the throttle body, that extra fluid is probably what made your car stall. Kawasaki Jet skis are know to have issues with their round body carbs. Idle mixture screw out of adjustment 4. Too fast an idle speed. 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. Re: 68 auto stalls off idle acceleration, need help. i sprayed that intake and carb all around with starting fluid it would only bog down when sprayed directly into the carb. Kawasaki Jet Ski Carburetor Issues. It won't hold an idle. 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. It now will idle with the choke off if I turn the idle up, but then it idles at about 4000 rpms when it is on choke. I like the last bit on missassembled carb's,very common. This screw holds the throttle slide valve open slightly to. car accelerates smoothly. After all the fluid burned away, your car went back to normal. Exhaust leaks. It should be getting air, with this warm weather now if I got s. I can turn the idle screw in, in, in with no effect. Carburetor Adjustments High Idle Adjustment Allow the machine to run until it reaches normal operating temperature, then set the mechanical speed control (throttle) on the machine’s handle to the fastest possible speed. but when I open it full throttle it dies out almost instantly as it shoots to fulll throttle. Scooter bogs out when I turn the throttle. and he cleaned the throttle plate and disconnected the battery for an hour. You may have to register before you can post: click the register link above to proceed. It begins to run efficiently and the metered amount of fuel coming from the idle circuit is enough to sustain an idle. If I get on the throttle right away, it will stay running but fades and dies as soon as I let it go. and then squeeze the trigger throttle to idle the saw. Carburetor Adjustments High Idle Adjustment Allow the machine to run until it reaches normal operating temperature, then set the mechanical speed control (throttle) on the machine’s handle to the fastest possible speed. You can imagine if the valve is stuck or sticky it can have wonderful effects on the ability of your car to idle. Causes of a rough idle. Fuel system problems are also a common cause of this - bad fuel pump, clogged lines. Battery remained disconnected for extended period. Checked fuel flow and appears to be fine. The Idle Air Control valve ("IAC") generally makes the car run like crap at all speeds. For example when it's about to die at idle if I step on the gas it will run a little longer. mechanics suggested that because it is winter, the car has to be heated up for at least 5-10 min before driving. Is it possible to change the little tiny springs on the carb, that closes the throttle and choke, because they cant pull them closed on their own. The following is a chart of potential carburetor problems and possible remedies. Cleaned carb twice very very thoroughly, good fuel flow from tank to carb, have proper sized jets, choke works fine, needle on the middle slot, no vacumn leak. It's like a whole new car. The only other thing I did was replace the T. Had the alternator rebuilt - Now I'm getting a 12. The best throttle cleaner will quickly restore this lost performance and prevent future damage. The annular boosters can also potentially offer improved mileage in some applications. Clean throttle bore and idle air control motor thoroughly using sensor safe carburetor cleaner. and i would assume its getting spark since i replaced the spark plugs and a bad coil and the car idles fine. the IAC port and throttle body good with carburetor cleaner, and replace the base gasket. car starts easy, but won't hold an idle & dies out 17 answers. I ended up just driving it around till it would idle and then letting it idle in the driveway for about an hour. Re: Engine dies at full throttle? Originally Posted by Jgaff2 If it's dying at full throttle your HSN would be too lean, but the only thing I can say about right after you let off the throttle is that your idle could be too low, so when the carb closes after you let off the throttle the gap is not allowing enough fuel through. Solving Intermittent Stalling Problems Download PDF. Carburetor Troubleshooting Guide. The machine is not a race car or motorcycle. Idles perfectly, but when you hit the throttle it backfires through the carb into air box and chokes to death. Someone please help me I caint figure out this problem I have a 93 gmc Yukon with a 383 stroker it won't start right or idle right I have to give it gas just to crank it and after it cranks it idles at bout 100 to 200 rpm then after while itl raise to 500 it has a little hesitation in the throttle my service engine soon light comes on then goes. There are several things that you should check: 1. IMO it would still be a good thing to determine whether the fuel pressure is correct. Read more only at www. As the throttle opens, fuel moves from the idle circuit to the transition circuit, which coupled with the accelerator pump shot, helps the carburetor move from idle circuit to power circuit. Could the throttle return spring tension have anything to do with it?. Re: 1992 club car. When the throttle trigger is pulled all of the way, the carburetor should be in the fully open position. will idle but dies when try to accelerate. I have replaced the fuel filter, air filter, rebuilt the carb (Walbro), new spark plug, decarbonized the exhaust port and removed the spark arrestor. The FS85 starts and idles fine. You can spray carburetor cleaner around the mounting plate and the throttle body. The repair and symptom guide will help you better identify the part needed to be replaced and how. Annular boosters (on the right), feature eight equally spaced smaller holes for better fuel atomization. Car turns off due to low RPM, only when starting car. I have replaced the electric solenoid on the side and checked for vacuum leaks. Yeah no idea if a carb engine would even have one, but on a modern car it's a little valve that opens when the throttle is closed so that the engine still gets air and will hold a steady idle. When accelerating it misses. The latter would be a very lean condition probably caused by the accelerator pump not working correctly, or the low speed adjusters are turned way too far in. 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. Not sure if related. If the car idles rough or cuts off at low RPM or idle, the cause could be a failing O 2 sensor. Terms often used are: Stuttering Hesitating Running Rough etc etc. Please advise me on what the real symptoms of lean vs rich system is. This is why once the engine is warmed up, it begins to idle and you no longer need to feather the throttle. Carburetor Troubleshooting Guide. They are difficult to tune and give many people many issues. Witch you would expect due to better flow. So, the car idles OK and runs fine at low speeds, but stumbles and dies on acceleration. Luckily there are telltale symptoms that will tell you which problem you're dealing with. Had it completely rebuild. well first off i have a mildly built 400 with new heads that flow better and i put a holley 650 on it and i was told by the guy who tuned and dynod it that it was the perfect amount so im curious if your puttin too much fuel into it and you need to put smaller jets in it. The latter would be a very lean condition probably caused by the accelerator pump not working correctly, or the low speed adjusters are turned way too far in. That a different application. Bike finally runs on the choke but runs like crap. This seemed to help very slightly, but ultimately, it still stalls out every time. The single hole job is for a 50-cc pump, while the others are used on 30 cc pumps. And when it comes to older cars and classics, well in many cases, they need even more maintenance, having at some point suffered from the ravages of neglect. Find the idle adjustment screw--typically, a regular slotted screw located below the fast idle cam (a small mechanism on the side of the carburetor) that rocks on a spring-loaded hinge. I have however noticed that once it's warmed up, if I slowly apply the throttle, it CAN increase up to full throttle in a controlled manner. I installed Denso Iridum spark plugs, replaced PCV, cleaned the MAF, cleaned throttle body, changed the oil , and replaced transmission fluid. I think it's just old gas in the carb. when I turn thottle up on carb it runs and not die but idea way to high. Overhauled a B carb. This requires that the throttle body be replaced. The bike hasnt been running to my knowledge for 4-5 months. If you let it warm up it will run but has no power from just off zero throttle. engine stumble under light throttle, stalls at idle Topic is solved Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine. The FS85 starts and idles fine. If they do, you have a leak. The engine idle speed memory may allow the engine to run without the sensor’s input, but the PCM cannot adjust idle speed with the missing data. Turn on A/C fans and Headlights and reset the idle with the idle screw on the right side of the carb. will idle but dies when try to accelerate. If engine hestitates in the transition, fine tune mixture so that the transition is snappy and idle is reliable. Kawasaki Jet skis are know to have issues with their round body carbs. Usually I would suspect main jet or air screw, but jet is new and I can run the screw both directions to no avail. And it doesn't matter if I've been running full-throttle, or trolling. But after a little while the idle starts surging. Honda man car stalls out when gas is applied it idles fine but stallsout when gas is applied - Answered by a verified Mechanic for Honda. My initial thought was the change the fuel filter. Now I have a new problem. Re: 1992 club car. I have no Air Fuel gauge, sorry. but when I open it full throttle it dies out almost instantly as it shoots to fulll throttle. car starts easy, but won't hold an idle & dies out 17 answers. If your Stihl chainsaw starts up with a reassuring puttering sound, but dies when you pull the throttle trigger, there likely is an issue with the fuel, but the carburetor could need adjustment. Lawn Mower: Engine Will Idle But Dies At Full Throttle. Wanted to say thanks. Ive idled up the carb with no effect. My car has begun to idle very low and stalls, why is this? is the throttle cable loose? I have a 1994 golf estate, the problem just occured whilest driving homealmost every time i used the brake to slow down the engine stalled. These I generally correlate to the first 1/8″, 2nd and 3rd 1/8″, 1/4 of throttle size, 1/2 of throttle size, and 7/8 to full throttle size (all measured from the shoulder of the needle). The O 2 sensor is out of the loop at full throttle and will not affect the way the car runs. Extra air getting past the intake manifold at the heads or where the carb attaches to the manifold is usually too little to effect running at half-throttle or above, but it play havoc at idle or small throttle settings. No problems at all. 7) Check idle solenoid, especially for power/ground, replace solenoid if necessary. use carb cleaner on throttle. When I cleaned the throttle body I noticed a vacuum hose connected to the intake boot before the throttle body was falling out because the boot was old and cracked. Carb A is the one that I rebuilt (by myself) a few months before replacing the engine. The 110 was running ok even with throttle but the motor was weak and smoking like a chiimney. car starts won't idle dies when you put it in gear off and holding the choke open look down the throat of the carb as you open the throttle, you should see a. The engine may run rough at idle and stall. The idle problems seem resolved when I replaced the automatic choke opener, but I actually think that was only a partial solution (as the best idle I was able to achieve was a suboptimal 1100). Replied by barneyb on topic Rochester 2BBL carb-Idle issue College man writes, "check the choke settings when cold". Motorcycle stalls at idle. Spray some carburetor cleaner into the throttle body. The best throttle cleaner will quickly restore this lost performance and prevent future damage. Is the accelerator pump squirting when you hit the gas? Is it aiming at the throttle plate gap? ~~~ Here's what Dave did in an attempt to fix the stumbling-on-acceleration problem -. Carburetor Troubleshooting Guide. Now including HGTV, Food Network, TLC, Investigation Discovery, and much more. From what I could tell, the previous owner had not done any of these things. 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 increased and steady idle speed can be one of the best warning symptoms for detecting a carburetor air leak. Here is what I did so far. so i have a homelite bandit sx-135 on my bike set up as a friction drive. 150cc GY6 Carburetor Cleaning Guide the way engine bogs down and wants to die if i let go of throttle it will idle fine any help. and i would assume its getting spark since i replaced the spark plugs and a bad coil and the car idles fine. stihl hs 45 hedge trimmer starts & idles, dies with throttle. i got an 85 250sx, just rebuilt the carb with manual in hand, one piece at a time. If you let it warm up it will run but has no power from just off zero throttle. car to drive back had a slightly. Good idle on my CT70 but bogs on throttle pretty bad. Loss Of Power Troubleshooting: Bogging Down too much throttle and the engine dies, and/or 3. I mean really jam it, maybe less than qtr second. Make sure the jets are seated firmly but dont crank them in too tight. The TPS on a 1998 4. with throttle, but if I move the throttle to neutral, it will slowly idle down to about 400 rpms, stay there maybe 5-10 seconds, and then eventually stall out. Ive idled up the carb with no effect. The bigger the gap, the higher the idle. I have a 1997 Polaris Xplorer 500 that idles just fine, but will start popping and die if I give it any throttle. But after a little while the idle starts surging. Take off the air filter and turn it clockwise (or counter clockwise as needed) to make the gap (looking into the top of the carb you will see a needle, the gap to the right of the needle) 1-2mm. 7 Idle surging,stalling in the alt. and after about 2 or three days is pregrssivle begins to go higher. If you should need to call REDLINE WEBER for technical assistance we will need to know your final settings to help. You'll hear it prime if it's working. that's when the engine wants to die. It turns clockwise to lean out and counterclockwise to enrichen. Engine speed increases, the throttle lets more air in, but the primary circuit is not allowing the proper amount of fuel to pass. It's like a whole new car. What you actually are doing when you depress the gas pedal is opening the throttle plate in the carburetor to admit more air/fuel mixture to the engine. 250sx carb issue, idles fine, dies if throttle is touched If this is your first visit to 3WHeeLeR WoRLD, please take a moment and look around. It seems as soon as I pull the throttle the engine dies. Comments: hi, I have a problem with car idling, when the engine is cold, the engine has aprox 400rpm close to 0rpm when the engine gets hot, it is getting under 0rpm and very often dies. And worse, many claims of lean conditions and rich conditions are contradictory. it STILL has the vacuum leak and for the life of me i cant find out where its coming from.