CAR STALLS WHEN RPMS DROP BELOW 500 MARK

  • Tiny
  • nicolesmith
  • 2001 Chevrolet Cavalier
  • 134,000 miles

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.

Friday, August 17th, 2012 AT 7:17 PM

10 Answers

  • Tiny
  • saturntech9
  • Expert
  • 28,387 posts

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

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Friday, August 17th, 2012 AT 7:55 PM
  • Tiny
  • saturntech9
  • Expert
  • 28,387 posts

Also which engine do you have?

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Friday, August 17th, 2012 AT 7:57 PM
  • Tiny
  • jbernal50
  • Member

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

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Monday, August 20th, 2012 AT 10:58 PM
  • Tiny
  • jbernal50
  • Member

And it wastes a lot of gas more than usual

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Monday, August 20th, 2012 AT 10:59 PM
  • Tiny
  • jbernal50
  • Member

And its a 2.4 thats the one I have

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Monday, August 20th, 2012 AT 11:00 PM
  • Tiny
  • saturntech9
  • Expert
  • 28,387 posts

Same model year etc?

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Monday, August 20th, 2012 AT 11:15 PM
  • Tiny
  • nicolesmith
  • Member

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.

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Tuesday, August 21st, 2012 AT 12:36 AM
  • Tiny
  • saturntech9
  • Expert
  • 28,387 posts

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.

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Tuesday, August 21st, 2012 AT 12:42 AM
  • Tiny
  • nicolesmith
  • Member

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.

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Friday, August 24th, 2012 AT 10:44 PM
  • Tiny
  • saturntech9
  • Expert
  • 28,387 posts

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

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Saturday, August 25th, 2012 AT 1:27 AM

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