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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?
Friday, November 25th, 2011 AT 8:16 AM

3 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
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
  • 2 POSTS
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
  • MECHANIC
  • 48,601 POSTS
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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