Brand new motorcraft plugs. Newer wires 20K miles or so. And yes secondaries open at 4k RPM. Ran fuel injector cleaner through system also to try to clear it up. No change. Any other suggestions?
Ok. Had a bunch of issues with this 90 MTX SHO. Finally got everything fixed except one driveability issue. If you are at idle and you goose the throttle the car will bog down and stall, or barely recover, 90% of the time. Tried running KOER test and car stalls midway through when the...
89-90IR(elay)CM = 91+CCR(elay)M also IR(unner)CM
Actually, thanks, but you're half wrong. According to AllData IRCM stands for Integrated Control Relay Module on 89-90 SHO's. 91+ it is called the CCRM: Constant Control Relay Module. They're the same thing and contain the relays for fuel...
Hello all, long time reader first time poster. I just picked up a 90 SHO MTX with 140K miles for free. Its really doggy after approximately 5K RPM. I read through hundreds of posts and came to the conclusion that the IRCM that I have is for a 3.8L taurus (so the fuel pump secondary voltage...