I have a 1993 Chevy Cavalier Z24 2.4 Liter. When driving at a speed 20-50 mph and you press the accelerator, the car will slow down a bit, rpms will drop slightly and then it will "catch" and give a slight ****. Also the car has a low idle and sometimes will shake a fair amount as if it's trying to stay running. The car will also stall on occasion when braking to a stop or turn. I have replaced the crank and cam shaft sensors as well as all the spark plugs. My next option is to replace the ignition coil or fuel filter. What should I do? Thanks
Ignition coil is probably it but check all your wires vacuum hoses for cracks or rotting or kinks stopping air flow or disconnected lines and make sure you have no corrosion on battery terminals take time covering your basics before you dump un needed money into it check air filter check screen on mass air flow also possible ecm comp failure just cover your basics with a close eye before spending money yes its possible its fuel filter or the carbon canister some cavaliers have a canister right behind the gas tank when it gets clogged up it will run rough you can clean them out though
Sounds like the tps or throttle position sensor
Check the tightness of the manifold bolts and look for evidence of a leaking gasket. If it is an injected petrol engine it could be leaking injector seals. Sounds like a vacuum problem. PS check all vacuum lines for cracks. Col
SOURCE: idle and stalling
Here is the most common cause of surges and stalls and low idle rough idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.
SOURCE: 1988 z24 cavalier 2.8 liter auto no spark
It is likely either the crank sensor or the ignition module.
SOURCE: 94 cavalier z24 boggles and stalls when stopping
This is a longshot, I recall a Pontiac Fiero that had a similar problem. It turned out to be the TCC ( torque converter clutch ). which is part of the transmission. The TCC engages when in high gear ( 4th gear in your case ) . It is supposed to DISENGAGE when stepping on the brakes and slowing down. If it doesnt disengage, what you are experiencing occurs. Does it do it all the time or only when car reaches operating temperature ?.
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**** means j*rk... also it is a 1999 NOT 1993
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