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Icreasing speed and stop speed

Tiny
KLIESTERJ277
  • MEMBER
  • HONDA CIVIC
1990 honda civic hatchback 1.5 300,000. When pushing down on the throttle I likes to sputter and when it is at a dead stop or at a low RPM the rpm's rise to 3000 and back to idel rpm over and over again. I have checked if I have a vac liek but I didn't see or hear anything. I think it might be a plug. I have tryed cleaning and repluging the plugs. But I don't know what to do next can you help?
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Wednesday, March 21st, 2007 AT 8:13 AM

1 Reply

Tiny
BRUCE HUNT
  • MECHANIC
  • 3,753 POSTS
You might have one or two issues.

The surging is possible due to a factor on this list:

- vacuum leak from a vacuum line
- intake manifold crack
- intake manifold gasket leak
- dirty idle air control valve
- dirty EGR valve
- bad PCV valve
- air in the cooling system
- low coolant in the cooling system
- sticking air flow sensor on the throttle body

There are others but those are the major players.

The sputter could be a plug or a bad wire.
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Wednesday, March 21st, 2007 AT 8:29 AM

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