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1994 Chevy Cavalier idles very roughly

Tiny
2CP-ARCHIVES
  • MEMBER
  • 1994 CHEVROLET CAVALIER
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 102,000 MILES
1994 Chevy Cavalier mileage: 102,000. The car seems to run fine except when I'm in drive and at a complete stop then it idles very roughly, makes the whole dashboard vibrate. It idles smoothly when the car is in park, reverse, neutral, and when the car is being driven. Can you give me any idea as to what the problem might be?
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Monday, November 22nd, 2010 AT 8:31 PM

3 Replies

Tiny
2CP-ARCHIVES
  • MEMBER
  • 4,540 POSTS
If a major tune-up has not been done recently, this could be the cause of your problem. Replace the spark plugs, plug wires, fuel and air filters, etc. Also, replace the oxygen sensor. In addition, service the fuel injection system. Clean the carbon deposits from the throttle bore and idle passages.
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Monday, November 22nd, 2010 AT 8:32 PM
Tiny
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Might want to do a compression check too? A weak cylinder may run fine at higher rpms and no load but under low rpms and load show up as rough running?
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+1
Monday, November 22nd, 2010 AT 9:54 PM
Tiny
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  • MECHANIC
  • 9,990 POSTS
Could also be a bad injector causing weak mixture under certain conditions?
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Monday, November 22nd, 2010 AT 9:59 PM

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