[horse482]

First off, I would junk those autolite plugs in a gm and put in some ac delco plugs. I had a miss in my '94, did a tune up, it had autolites in it, changed to ac and has ran fine ever since. The other thing that you need to look at is the egr valve and egr valve control solenoid. If the egr valve is stuck open it can cause a miss, or if the solenoid is bad and allowing it to pull full vacuum it can cause it to open the egr valve to early.