IMR ctrl bank #2 stuck open

[dboogren]

The code i got with the scan tool came up as... IMR ctrl- bank #2 stuck open. i have no idea what this means so please help.

[ruggratt]

Originally Posted by dboogren

The code i got with the scan tool came up as... IMR ctrl- bank #2 stuck open. i have no idea what this means so please help.

IMRC is intake runner manifold control.They are the secondary butterflys in your intake manifold, sort of like the secondary butterflys on an old 4 barrel carburetor. It should only open at high throttle, 3000 rpm or so. I know on my 1996 there are two IMRC's, one for each group of cylinders. They are vacuum actuated and sometimes the diaphram goes bad causing them to not hold vacuum and stay open. If they really are stuck open your van is probably running rough right now. I would guess you need a new actuator.

Those actuators are normally closed at idle. However you can check them (with the engine cold and off ) by pulling off the vacuum hose attached and to one and push the rod in. Then cover the vacuum hole on the actutator and release the rod. If it doesn't hold then that one is bad. If the first one holds then check the second. When you find the bad one, leave the vacuum line off and disconnect the actuator rod from the intake butterfly. Block the vacuum line with a screw or something and manually move the butterfly to the closed position. Your idle should improve now as the van is running the way it should with the butterflys closed. Those butterflys open at 3000 rpm or so normally. Unless you constantly exceed 3000 rpms it is not a rush to replace the imrc, I have the same problem with my van and it is running fine with this temporary fix.

[jcottle]

Just had this same error code on my 98 windstar replaced the imrc and the problem is fixed, mil light turned off, and I have noticed better performance. Search the threads on this forum there is plenty of information on where they are located and how to replace them.