I have a 98 Isuzu Trooper 3.5 with 98500 miles.
I replaced the rings, rod and main bearings, crankshaft, timing belt and idler pulleys. New TPS, and MAF sensors. I also replaced the Idle air control with a used unit off a 91 chevy beretta. Since replacing the IAC, when you first start the engine it immediately goes to 2000 rpms then after about 20 seconds it drops gradually to 830. Outside temp is about 30 degrees. Are all IAC's that look the same created equal?
Also when I drive it gently it runs great, but if you floor it it seems like it misses and the check engine light comes on immediatly and starts blinking. I pulled the spark plugs and though they were newly installed they are velvety and black.
I haven't driven it since replacing the MAF sensor.
have the same problem?
Tuesday, March 6th, 2007 AT 7:25 PM