i have a b18b in an 89 4 door and i have an iacv code on my ecu... but everytime i change it the code stays and the idle doesnt get fixed. the parts are not bad it just doesnt seem to work.the head on the car is milled 30 thousands and has crower stage 1 valves, springs, and retainers. but it has stock ls cams. could fuel be a problem here or is it wiring?

-joe

 

did you reset the ecu after changing the iacv?

 

^what he said, george.

 

yea.... then after i do it doent give the code anymore for about 10 seconds then it starts again

 

bump

 

check wiring? do you physically change the iacv or just try to clean it? sometimes a bad O2 or map sensor will also throw a iacv code.

 

really? i am gettin an o2 code too but i have not changed that yet, yea i have changed the iacv twice and i cleaned it. ill try changin the 02 then report back.

 

when it comes to O2 sensors. OEM or ntk are your best bet. i've heard that bosch O2 sensors though cheap, are hit or miss type of sensors. i've even heard that some go bad in about 2 weeks.

 

never saw one go bad in two weeks, mebe that guy was boosted?

 

I fixed alot of your idle problem by clamping your FPR line, get an adjustable FPR and turn the fuel up a little, change the o2 like they said and mayby put in the wally fuel pump. Reset ECU and you should be good. Theres no way that iac is bad, the car we pulled it off of wasn't throwing any codes.