After 8 long months and 2 bad engines I have a running 3L (170psi). It's a 98 block and heads with SVT cams as well as an aftermarket flywheel, 4 new O2 sensors, FMS wires, Pro-M 75mm calibrated for 24's. The engine seems to be running ok with one exception that I can't figure out for anything. The car is kicking the CEL with codes P301 through 306 (Miss-fires at all times. When accelerating it will hesitate really bad until around 3500 at which point I have no trouble all the way to redline. The car has a new Cat in it with punched out Pre-Cats. Originally I had thought that the car was running lean. After taking out the plug today (autolite copper core .48 gap) they are carbon fouled.. black as can be... indicating a rich condition.. I can't figure out why it would be though. If anything I would have thought lean without MIL eliminators in place for the hollowed Pre-Cats. ?? Any suggestions would be great.. can't figure this one out at all. Also I must mention that this is my second set of plugs in the car after noticing the first set being fouled. I have also replaced the TPS with the 3L one as the original was bad. I have also replaced the IAC.
-Nate
98.5 SVT
-all the goodies
