Vacuum Leak?

JinCivic

New Member
99 civic automatic, when I start the car it idles up and down slowly at 1200 to 1600rpm up and down for around 15 seconds then car runs fine like a champ idles fine at stops until I start it up again then randomly will idle hunt up and down.

I clean the IAC, throttle body w/ new gasket, fuel flter and did the coolant.

No cel.

Tried finding a vacuum leak with crab cleaner... no sucess:(
 

AyyCookie

New Member
Fast idle Thermo valve.


My Honda sucks. For now.
 




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