[OKGMC4]

Ok I now have answers...for one the tach signal multiplier was set to double. Good if you run a factory v8 calibrated tach but bad if you have an aftermarket tach already set to 4 cylinder mode. Easy fix.

The misfire he saw is random and only shows up in one frame out of ten. So sometimes, for a tenth of a second, above 4200rpm, it shows a misfire. Bad spring or rocker would be constant and run like crap all the time. You can't even feel it but efilive caught it. May or may not be a bad plug or wire. Wouldn't be surprised there. I had to replace two of these NGK plugs new out of the box that wouldn't fire at all.

And lastly the trans is done. I drove it home (only two miles) and it lost second gear as well on the way. The tranny guy says my low mileage means nothing when it sat on the garage floor for 5 years. He thinks the seals dried up and the trans couldn't hold pressure right. He swears the pump must be out. I'll pull the trans myself and save some cash on the rebuild but this sucks. I'm planning on making a rod run from Oklahoma to Tennessee in about 4 weeks and need to get it back on the road.