ENGINE SURGES OCCASIONALLY WHEN STOPPED AT A ...

  • Tiny
  • siark
  • 2003 Chevrolet Cavalier
  • 60,000 miles

Engine surges occasionally when stopped at a light.

Andy

Tuesday, December 4th, 2012 AT 5:27 PM

6 Answers

  • Tiny
  • saturntech9
  • Expert
  • 28,853 posts

Any codes?Have you tried cleaning the idle air control valve?Or looking for vacuum leaks?

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Tuesday, December 4th, 2012 AT 7:13 PM
  • Tiny
  • siark
  • Member

No codes. Cleaned iac valve & throttle valve. Checked for vacuum leaks w/ soapy water.

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Tuesday, December 4th, 2012 AT 8:47 PM
  • Tiny
  • saturntech9
  • Expert
  • 28,853 posts

You can't look for vacuum leaks with soapy water because vacuum is the absence of pressure and wont blow bubbles. The way I check for leaks is with some carb spray spraying it around at idle and watch for a rise in or fall in rpms stumbling or dying.

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Tuesday, December 4th, 2012 AT 9:06 PM
  • Tiny
  • homer1967
  • Expert
  • 902 posts

There are so many things that could cause a surge. If you have no codes and no vacum leaks I would have to suggest that you take it to a shop for diagnosis. You don't want to waste any money on uneeded parts. There are dozens of things that could cause your issue.

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Wednesday, December 5th, 2012 AT 1:45 AM
  • Tiny
  • siark
  • Member

One last thing-can you tell me how many vacuum hoses there are, and where exactly they're located (it's a 2.2 litre manual). Maybe I missed one.

Thanks

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Wednesday, December 5th, 2012 AT 9:44 PM
  • Tiny
  • homer1967
  • Expert
  • 902 posts

No I can not pull up vacum diagrams.

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Thursday, December 6th, 2012 AT 2:18 AM

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