I have a b16a2 swapped into a 96 EK coupe....

Anyways I really didn't have any problems till I switched to a chipped ecu.

Now when my car is cold my idle hops from 1500rpm to about 2k. It happens intermidently and only on idle.

Also I notice that if I leave my car idling and it warms up it stops and idles at 900-1krpm.

Any idea what could be causing this? Is it the ECU? or is it another problem?

 

sounds like an iacv

 

Well I just installed my skunk2 intake manifold about a month ago and I cleaned out the iacv and didn't have any issues till the day i put it in the new ecu.

 

did u install your ecu and clean out your iacv at the same time?

 

No like I said I put on the new ecu about two days ago and cleaned the IACV last month.

 

no cel i assume?

 

nope....

 

what ecu are u running?

 

what kind of chip? if it is programable ecu you need to turn the duty cycle of your IACV down

 

It is a chipped ECU from monotech.

 

do u know what ecu it is though...

 

Monotech? never heard of them .... i would try and talk to who ever tuned the chip for you.

 

happened to my car, clean the iacv, then check wiring, then ecu... may be one or a combo of all of them.... or maybe whoever tuned it messed up... and does it ever sputter when youre driving at all???