Hi I have a R33 gtst. My car no matter if its hot or cold will not idle. This is what it does car starts easy, revs to 1900 rpm,drops to 1500, pause, then to 1000 for a sec then dies. Stalls all the time. Runs perfect above 1500 rpm.
I have a HKS Sq BOV.
I have tried so far:
Cleaning Acc valve and all that muck out of the back of the plenum
Repacing fuel filter
setting the TPS
Turning Idle screw in and out with the TPS disconected ( For some reson the IDle does not change 1 bit weather i turn it in or out)
Cleaning out the AFM
Located where the Ecu idle screw should be, to find the isnt 1 on it
checked for leaks
what have i missed? Can someone help me out please!