EdPDX

Where is this module located? My Chiltons OR Haynes shows it at the opening of the throttle body? I bought the module... just can't find anything that looks like it?!

Thanks, Ed

ryoder

It is located beside the intake plenum. Looking from the front of the car,it will be located on the right side(driver side)rear of the engine. You will have to get a long extension in order to stay out of your own way when removing the part and bolts. Also there is a electrical connection and vacuum connection to remove . Good luck!!!

EdPDX

Thanks, I found the IAC, man is is buried on the 92 GM 4.6! Then again everything is- I guess the engineers bury everything these days to discourage owner maintainence (bring it to the dealer to replace the EGR- heck on my truck and cougar- two bolts 20 minutes, presto!)

Anyway- got off track! What I have now is a code 556, which according to Chilton for a 92 G/M is: Fuel pump primary circuit failure. I replaced the IAC PFE and EGR Vacuum regulator- I tried to get the EGR off; but the bizzaro monkey finger micro hydraulic wrench is loaned out right now. The old EGR is still in place.

Now the check engine light is off; but I am getting a 111 followed by a 556 ?!?!
The car stumbles at part throttle and has severe power loss at uphill load. I suspect a vacuum leak; but can't seem to find one. Could this be The primary fuel system (where to check?) or is it the EGR- I cleaned the hell out of the channels under the TB elbow that lead to the EGR. OR is there a chronic leak in this sytem that is really snealky?

Thanks,

EdPDX