ive changed the IACV because it crapped out on me. now that i switched it when i rev the engine it drops the rpms to like 1000 and brings it up to 1500 and trys to idle down but only stays at 1000 and eventually goes into limp mode ... what could be the probable cause for this ??

 

Pull the code from the ECU and go from there.

 

it says its the IACV malfunction or somthing like that and theres noways cuz i just replaced it [&:]

 

Is it hooked up correctly, and fastened securely? Not trying to be condescending, we all make goofy mistakes from time to time. DOuble/Triple check everything.

Have you tried bleeding the coolant system?

 

im sure its on there good. [:@]no i havnt tryied bleeding it. how can i do this ? and would this be the problem to this headache lol

 

Forty04i read your DIY on bleeding bleeding the cooling system but its kinda hard to understand without pics

 

What CEL code is being thrown? What year Civic?

 

its a ej8 i cant remember the code by heart but im pretty sure thats what it said ... and i went to my mechanic right now and he said it couldnt be bled because it dosnt have that bleeder screw .... he wants me to leave my car for a day to run tests on it [&:]but i want to find it out myself

 

To fix the problem, you need to know the specific CEL code. There are several different CEL codes related to the IACV. Each code would possibly take your troubleshooting effort in a different direction.

Take the car to AutoZone to retrieve the code free of charge.

What year is your Civic?

 

its a 00 ex ... but how can i do this you said iton another thread of mine .....As you say, the IACV code generally indicates a faulty IACV; however, if cleaning or replacing the valve does not fix the problem, then you may want to troubleshoot the IACV/ECU circuit.