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1993 Honda Civic fast idle at stop or neutral

Tiny
MSILVA3760
  • MEMBER
  • 1993 HONDA CIVIC
Engine Performance problem
1993 Honda Civic 4 cyl Front Wheel Drive 180000 miles

my car just started doing this, eratic idle in park or stop lights.
Sunday, October 12th, 2008 AT 9:24 PM

2 Replies

Tiny
BRUCE HUNT
  • MECHANIC
  • 3,753 POSTS
Would you say the engine is surging and only when it is warm, that is the engine is warmed?

If so, my question that might seem stupid is when the engine is cold does it idle fine?

First thing to check is the engine coolant level. Then warm the engine and once it is good and warm, slowly crack open a bleeder on the engine coolant system. There might be some air in the system. Next look for vacuum leaks.

Is the check engine light on at all?
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Monday, October 13th, 2008 AT 11:43 AM
Tiny
MSILVA3760
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  • 2 POSTS
Maybe you have a point. Does not do it when the engine is cold, but within 10mins of running it begins.
Only in neutral or park, from what I can tell.
Engine coolant is filled to the top of the radiator, reserve has nothing in it. No check engine lights, engine temp guage is normal in the middle
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Monday, October 13th, 2008 AT 2:02 PM

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