Hello everyone... i'm just wondering why when i start my car it idles and then idles iradically. my uncle said it was a vaccum hose..can anyone back me up on this? the engine is warmed up and its not cold. i need my car fixed!! thanks for any info on what i can do!

Mark

btw, its a 90 honda civic std 4 speed tranny w/ dpfi


[Modified by pinoyboy204, 10:10 PM 12/24/2002]

 

Not trying to be mean but waht i think u should do is get a new motor b16 or zc or ls whatever but 4speeds suck man get a faster motor!

 

it sounds easy if you have the flow..if you dont..then whats to go? i need to fix this....its my winter beater.

 

Sounds like a bad IACV (Idle Air Control Valve). It should be located somewhere on the intake manifold. It should have 2 hoses on it, that contain coolant. Basically, the IACV allows extra air into the intake manifold during cold starts to allow the motor to get to operating temp quicker. Often, when a IACV goes bad, fluctuating idle is a symptom.

 

how would i be able to fix the problem? is the 2 hose loose or soemthing? could it be the air box filter??? let me know...

Mark

 

this problem is usually associated with engine swaps, and it can be caused by
a bad eacv , vacuum leaks or about twenty other things. If you do a search on this
site you will find a wealth of info from people who have had this problem.

good luck

P.S. for the time & cash involved, clean the intake inside & out with carb or throttle body
cleaner (especially the eacv, but make sure to let it dry before putting it back on) and
replace all of your vacuum lines. This would be a good start.

cheers

 

might just need to take it off and clean it out with carb cleaner.