My chey cavalier is stalling sometimes but not all ways what it is doning is when the AC is on and your driving at 55 the car is fine but when you come up to a red light it wants to stall the RPMs for crazy from 750 drops to 500 and the shoots up to 1200 1000 rpms and back down to 500 and wants to stall I need to no what this is! Not maybe its that what is wrong with this 2002 2.2 echo tech

SOURCE: when the traction control light

sounds like your alternator is not giving out the correct voltage or isnt giving out any voltage. computers need the correct voltage to work properly. if your alternator is bad and your battery gets drained then that could make the computer give funny codes and make it run rough. the simple test is to unplug your positive battery cable after you start the car and see if the car still runs. if it does then the alternator is working. if you have a volt meter you can make sure that the alternator is giving out between 12 and 15 volts.

Harvey N Tawatao

• 3854 Answers
• Posted on Apr 07, 2009

SOURCE: around 1500 rpms or 55 mph engine seems to bog down

It sounds like your low on fluid, or your transmission filter is dirty and the front pump is not getting enough oil supply. Worst is your front pump is going bad. 
Check the fluid level and see if it's burnt. Good luck

SOURCE: Duramax Shuts off at 1000 rpms

I had the same problem and it ended up being the EGR Valve that was sticking.

SOURCE: 95 2.3l ranger: When engine is cool, it will miss

an ignition coil and/or wires seem to cause the most trouble when cold or damp. Sounds like you have a bad coil or wire(s). Spray down ignition coil and wires with water (in a spray bottle). If the engine reacts you may be onto something. I have also seen carbon tracking on the spark plug that can cause this. Cracked coil housings are common on a lot of Ford ignition systems

SOURCE: 1999 pontiac grand am 4 cylinder rough idle, rpms fluxuates

Most likely your throttle position sensor is faulty. You could have a vacuum leak as well. Most probable cause is a bad sensor. Is your check engine light on? Have you checked your engine codes? You can go to autozone.com and register for full free online repair manual.

Testimonial: "the check engine light had been on but we unplugged the battery yesterday for a couple of hours and put it back in and the light isn't on anymore. "