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2001 Chevrolet Cavalier Repair Question


Topics covered: Engine, Mechanic, Sensor.
Mileage: 134,000 miles.

Asked on August 17, 2012

Car stalls when RPMs drop below 500 mark

I have an 01 Chevy Cavalier Z24. When I brake to slow down, if my rpms reach the 500 mark, it usually stalls my engine. I can try to rev my engine, if I catch it in time, to get it above the 500 mark and the car won't stall. While driving, I can feel the delay in my car shifting gears as well. I just took my car to a mechanic to get a new O2 sensor. Had my car tested and the O2 sensor was the only thing that read bad. So now I'm once again stumped.
Avatar Asked by nicolesmith

Answer

Replied on August 17, 2012

If you turn on the ac does the idle problem go away?

Tiny Answered by saturntech9 (expert)
23,174 answers provided
Replied on August 17, 2012

Also which engine do you have?

Tiny Answered by saturntech9 (expert)
23,174 answers provided
Replied on August 20, 2012

i have the same exact problem and the ac is off when that happens

Tiny Answered by jbernal50
0 questions asked

Replied on August 20, 2012

and it wastes a lot of gas more than usual

Tiny Answered by jbernal50
0 questions asked
Replied on August 20, 2012

and its a 2.4 thats the one i have

Tiny Answered by jbernal50
0 questions asked
Replied on August 20, 2012

Same model year etc?

Tiny Answered by saturntech9 (expert)
23,174 answers provided

Replied on August 21, 2012

It's a 2.4 as well. I have to leave my a/c on at all times for extra assurance but the problem still occurs with the a/c on too. Just not as quickly as with it off. Still have to rev engine to prevent the stalling when braking.

Tiny Response from nicolesmith
1 question asked
Replied on August 21, 2012

If the problem doesn't go away with the ac on its not the problem I thought it was.Do you have any codes in the computer?I would also try removing the idl air control valve and cleaning it.

Tiny Answered by saturntech9 (expert)
23,174 answers provided
Replied on August 24, 2012

I'm not sure about the code thing. But also, my mechanic had asked me today if the stalling occurs after my car warms up and it does. I don't know if that would help in answering or not. They're gonna take another look at it Thursday.

Tiny Response from nicolesmith
1 question asked
Replied on August 25, 2012

I would check it for codes and also clean the idle air control valve. please keep me posted.

Tiny Answered by saturntech9 (expert)
23,174 answers provided