cleaning IMRC 96-98 cobra

Bianner · Mar 9, 2011

so the cobra has been acting up again. i thought it was the o2 sensors because i drove over something and it cut up a wire from the mils i made so i re did them made them look nice and what not. and it was still acting up so i hooked it up to the reader and it gave me p1519 IMRC STUCK CLOSED so i searched and decided to clean them. found this article http://www.svtmustangcobraclub.com/media/pdfs/tech/IMRC_Cleaning.pdf

IF U SEE IN THE MIDDLE THERE IS A UNPLUGGED WIRE THAT GOES TO A SENSOR OR SOMETHING CAN YOU TELL ME WHAT IT DOES IT WAS UNPLUGGED AND IDK WHAT IT DOES. JUST CURIOSITY I PLUGGED IT BACK IN

I WAS PUTTING EVERYTHING BACK TOGETHER WHEN I NOTICED THAT ONE OF THE GASKETS WAS MESSED UP SO I GOTTA WAIT TILL TOMORROW TO FINISH

Mystic SVT · Mar 9, 2011

I'm assuming the plug your talking about is the connection to one of the knock sensors.

I know there is a way to check to see if the IMRC controller is still working. A lot of the times the controller is what goes out and it will give you a code for stuck IMRC's. Mine had gone out on my car so I just went ahead and made IMRC deletes.

Shifty Powers · Mar 9, 2011

F that... delete them bitches if u have gears

Bianner · Mar 9, 2011

Mystic SVT said:
I'm assuming the plug your talking about is the connection to one of the knock sensors.

I know there is a way to check to see if the IMRC controller is still working. A lot of the times the controller is what goes out and it will give you a code for stuck IMRC's. Mine had gone out on my car so I just went ahead and made IMRC deletes.

How,????????????????

BigTang · Mar 9, 2011

either pull the butterflies off the shafts and put it back in like that or pull the shafts entirely and plug the holes left by the shaft with epoxy. Most people are stuck w/ a light on once they do it though.

Venomous96Cobra · Mar 9, 2011

Bianner said:
Mystic SVT said:

I'm assuming the plug your talking about is the connection to one of the knock sensors.

I know there is a way to check to see if the IMRC controller is still working. A lot of the times the controller is what goes out and it will give you a code for stuck IMRC's. Mine had gone out on my car so I just went ahead and made IMRC deletes.

Click to expand...

How,????????????????

http://www.lmgtfy.com/?q=How+to+delete+the+irmc+in+a+mustang+cobra+

Bianner · Mar 9, 2011

I,m gonna test it with a volt meter. And can someone find me an article on how to do the imrc delete? I can't find a step by step one.

Mystic SVT · Mar 9, 2011

Making IMRC deletes is not very difficult, you need to remove the butterflys off the rods and once that is done the rods can come out. You will basically end up with just the bare composite IMRC plates. Use expoxy to close up all the holes left open from removing the rods. The IMRC controller (bolted to bottom of intake) will need to be removed along with the IMRC cables. You will get a code for the IMRC's but they can be turned off if you plan to get the car tuned.

On my car I used industrial strength JB weld since mine are aluminum, but you will have to use epoxy since the 98s came with plastic/composite IMRC plates.

Bianner · Mar 9, 2011

what would be the gains of deleting these??

Mystic SVT · Mar 9, 2011

Actual gains are minimal, only about 2hp gain on the top end, but since Ford doesn't offer the actuator anymore and having to take them out to clean them every 60k miles because they gunk up makes deleting them your best bet. Also, non working/stuck IMRC's will rob you of a lot of horsepower from 3450 RPMs up to the redline. Also, if you ever go with forced induction having deletes will be better since there will be nothing obstructing air flow.

Bianner · Mar 9, 2011

ohhh i see any disadvantages?

Mystic SVT · Mar 10, 2011

^^you might feel a loss in torque from idle to 3450rpm, but if you have gears (4.10s-4.56s) you will most likely not notice the loss. Once you get past 3450rpm there is no loss since that is about where the IMRCs would open up the secondary ports to allow full airflow to both intake valves.