Here is what I know:
- No Cat. Conveter on it
-Truck runs wosre with a muffler on it (runs fine with open manifold but still glow just a little)
-Adjusting AFM does no good
-Timming is good 5 to 8 BTDC
-Timming is advaning fine
-o2 sensor is good ( took off of trail truck that runs fine)
Help Needed! Driving me crazy
