P1516 & P1518 Codes

[Blu50Stang]

Ok, I've been plagued with the p1516 and p1518 codes. And I've searched and read the archived threads.

When they first appeared, I checked the cables, they aren't kinked. I can't feel/hear the IMRC's open(I usually can). I've cleaned the IMRC plates/butterflies with no success. I've already swapped out the IMRC actuator for another that I bought from an SVTPerformance member as "NIB" which looked to be brand new.

On the first test drive, I realized that I forgot to plug the IMRC actuator into the harness, but still got the p1516 & p1518 codes. I got home, ran codes, cleared them with the scanner and then managed to plug the connector in without removing the manifold. I then went for another test drive, stopped for gas, and upon start-up, there was the CEL AGAIN :mj:

Any recommendations on how to proceed from here. Does anyone know of a way to trouble shoot the 2 actuators I have? I'd love to be able to see that they are both bad before I go buy another one. I need to get this car smogged soon.

 

[Blu50Stang]

Upon closer inspection, the driver's side is actually sticking shut randomly. I had my gf sit in the car, rev the engine (WOT) beyond 3500rpm while I watched the ends of the cables with a mirror. Any idea why an IMRC plate that was cleaned would still stick?

 

[98 svt]

...subscribing...

 

[fivepointno]

just deleted mine awaiting a custom tune.

 

[Blu50Stang]

Trust me, I've thought about deleting the IMRC's. How'd you tune the car? A chip? If so, which brand and, if you don't mind, how much did it run you?

 

[98 svt]

My local tuner told me NOT to delete the IMRCs, unless I go F.I.


He said it's a big mistake, even with 4.30s or 4.56s.


That's enough for me to not do it.

 

[Blu50Stang]

Obviusly, I'd rather NOT do the IMRC delete. This is my gf's stock Cobra. Any ideas yet? Someone's gotta have some input for me.

 

[98 svt]

You can't just attach the positive and negative wires to the car's battery? I don't know either, it's just an idea.

 

[Slow95Cobra]

well the 1518 means imrc is stuck open, and 16 means input error... and there is 2 seperate test for the codes... kinda hard to walk you though it with out you using a datalogger... may need to just take it to a dealer. could have some wiring issues