Idle is going up and down like crazy

Tiny
AVI_3
  • MEMBER
  • 1997 HONDA CIVIC
  • 149,000 MILES
Hi my civic rev goes up and down while accelerating and also does the engine with it. What could be the problem?
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Friday, November 25th, 2011 AT 8:16 AM

3 Replies

Tiny
HMAC300
  • EXPERT
Clean teh throttleplate with choke cleaner on both sides as well as the iac hole. After or before doing this spray choke cleaner around intake manifold to check for a vacuum leak, the rpm will change if it does. Then check yoru fuel pressure as it could be low pressure or a pressure regulator.
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Friday, November 25th, 2011 AT 4:17 PM
Tiny
AVI_3
  • MEMBER
Hi some one told me that it could be the map sensor. Do you think that it could be the problem?
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Saturday, November 26th, 2011 AT 5:48 AM
Tiny
HMAC300
  • EXPERT
It could be but an engine scan would prove that out. If you have a vacuum line going to it, then check for the line being soft and sucking together while running or disconnected.
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Saturday, November 26th, 2011 AT 2:56 PM

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