Hey guys, I swapped in a CL-S6 engine into my TL-P, and noticed my IMRC wasn't working. I followed the troubleshoot and diagnosis procedure from the manual. I was thinking it was a problem with the wiring, but it just turned out that the IMRC actuator had a problem.

I opened the actuator, and found that one of the gear teeth very near the open side of the gear was broken. To fix it, I just set the cable adjustment open enough so that the gear stops right before it hits the missing tooth. Downside is that the cable is always pulled a bit, even at idle.

The problem I noticed was that the IMRC actuator now opens when I hit around 4k, however it doesn't stay open. It just opens and then closes immediately, even if I don't decrease idle. Is this normal? I figured it would open, and stay open until I went below ~4k.

 

I could not get my irmc working when I swap in a type s motor either.
I used to differnt msd switches and nothing still.
I just removed the butterflys..

Got a imrc for sale if you want to get another one.

 

i think its supposed to stay open chief.. therefore whatever is sending the voltage is not sticking on

 

You are correct, it should open at 3800 and close when you go below 3800.

 

Fuuuu....

How much?

 

I'm not to sure how much this helps, but when I did the swap roughly 10 yrs ago we ended up buying a $50 module that controls the actuator from the dealership that fixed the problem. If my memory serves me any good, that module is located inside the car and not in the engine bay, which was why most missed it during swaps. Best of luck.

 

Yea that's the IMRC modulator. It is under the left side of the dash. Black box with blue connector. I've never heard of it fail, but might as well try replacing it if a new actuator doesn't solve the problem.