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Originally Posted by lonerider909
Busboy4, sounds like a vacuum leak is part of your low idle condition. I replaced one of the MIRCs early this year, which is pretty easy. The diaphragm in the MIRC goes bad and introduces a vacuum leak. I plugged the vacuum line going to the bad MIRC and wired is closed. The engine off condition for the MIRCs is open and it should be closed under 3,000 rpms. The purpose of the MIRC is to reduce turbulence in the intake air flow as the engine demands more air/fuel.
I purchased my MRIC from http://www.y2kford.com for $150. They provided me with great service, and I will do business with them again. Much cheaper than the local Ford dealer. |
Yeah thanks
I will have time starting tomorrow to systematically troubleshoot the problem. In my case, neither of my IMRC's are closing at idle. Checking them individually with my vacuum pump, the rear holds vacuum and the front (recently) does not - see my post on "IMRC's, be careful". I am mostly suspecting the IMRC solenoid on the rear of the manifold. My hunch is that it is not opening to allow vacuum to the IMRC's. Now, it perhaps could be a vacuum leak prior to the solenoid. My cursory checks thus far say no, but I have not been able to do a slow, systematic check as yet. I'll let ya know.
As for y2kford, I have purchased from them too. They were good. I have also had good luck with fordpartsonline.com, which is also part of trademotion as is y2k. 'Cept fordpartsonline is a texas dealer.