svtpimp
New CEG'er
Well I've had some trouble with my IMRC and have performed the transistor replacement twice. When it messed up with the 2nd transistor the IMRC would open and close, open and close, then just stopped working all together. So then I ordered a new IMRC from Ford, installed it, went for a test drive and it opened awesome once. After that it just stays open. So I pulled the wiring diagram at work and seen that there are 3 IMRC control wires comming from the pcm. Now the IMRC has power from the injector circuit and that was good, ground was good, so I figured that the IMRC control wires were ground swtiched by the pcm. So I measured the resistance from the IMRC plug to battery ground. The black/red wires had 0 resistance, where as the black/blue wire had a resistance of .946 ohms, therefor most likely grounded somewhere. So i pulled the UIM off to trace the wires through the harness to check for any worn through wires, none. Then I seen the connection on the left side of the intake manifold, checked resistance from IMRC plus to there, 0 for both wires. Checked it from the other side of the plug to the pcm harness, nothing. So then i plus it back into the pcm and check the whole circuit and its grounded again, even with the battery diconnected. Bad pcm? When I first start the car the IMRC is closed, then about 5-10sec later it opens and stays open.Any ideas? Sorry about the long post, any help would be great thanks Mike. BTW I hooked up the Snap On Modis and tried a KOEO/KEOR and it would just give me a 'test incomplete' and referred to the P1518 IMRC stuck open code. Thnaks in advance Mike.