Allright, i am still hunting my iac trouble, for 2 weeks now
Wont idle at all seems to be running on 3 cylinder
The car only give code 24.
Ej20g 1994 jdm wrx
Coil on plug
Fuel pressure OK
Spark plug 2000km
Timing belt new 1 month
Fuel filter 3000km
Now, without the iac solenoid conected, i am getting ground 12v ground to the plug
When i connect it, i am getting the 12v on the 3 wires
At first, i was getting 12v 12v 1v
But by the week, i am now stuck with 12v everywhere
Ive tested all ground wire at the ecu and they looked fine.
Ive tried running separe wire directly from the ecu to the iac, same thing happening
Tried another main relay
Ive tried 2 other iac solenoid , they tested both 9ohm
And my old tested 9ohm too
Ive tried 2 know good maf
Tps is working fine, idle switch too. Ive tried another witch was working before
I looked for ohm between ground and ecu ground and i do get 5ohm but the manual tell me 10 max.
Ive tried back probing all ecu ground to the body to see if maybe i had a bad ground that my brand new snap on multimeter could not tell me without succes.
One thing i noticed !!!
While working today ive put the ground from my 12v led lamp to the ground to ecu that plug on the intake nornally ( now on body ) while it was not on the car but key on. The led lighted up but looked like would have 3volt on an hallogen bulb.
Tried stock ecu, same story
I just redone the whole grounding system with fresh wire and by the good way
When i look At the wiring in the diagnostic book, the white and the black wire are going directly to the ecu And the 12v middle wire is coming from the ignition relay
I did not try another valve body thought, but last time i cleaned it was this summer. Spin freely
Im out of idea someone need to
Give me some input on this ! Thanks