dwightfraser

Just baught an 88 Z28 with a 2003 ZZ4 Crate motor w/stock TPFI, Holly throttle body, 24 psi injectors, Chevy hot cam, 3 inch stainless exhaust all the way back, no cats, 5 speed manual. Test drove the car and it ran great. I ran it some for 4 days then just after an oil change it started missing when the motor warmed up. Running very rich, blowing black and somtimes white smoke out the dual exhaust evenly on both sides. It seems like the ECM might be injecting to much fuel. Now it is missing all the time. What I have done so far is as follows: checked fuel pressure, coil, distributer,read all injectors with meter and they all were close to 12 ohms,checked ECM for codes and there were none. Checked the wiring to and from coil and ignition module. Checked the spark plugs and they were all carbon fouled evenly. This car is kicking my butt!! I plan on getting the test lights for checking the signal at the fuel injector connectors but haven't done that yet.

Any help would be great!!!

camarotucker

iTrader: (2)

compression/leakdown test

dwightfraser

It was a bad ECM, Thanks for your reply!!!