Well lately my truck has developed a horrible shudder/miss under load. While in park i can hold the engine at any rpm or rev it with no problem at all. Under light acceleration it doesnt seem to miss, but if you need any power it misses horribly. While cruising in overdrive it may miss on occasion, but give it a little more throttle in overdrive and it misses bad. I can recreate the missing forever but i never can get a CEL to show up!

My HT0 plugs only have 5-6k miles on them, my truck is supercharged. I did have a big problem with my crank ventilation oiling up my air inlet and going into the engine, so i though maybe the plugs are fouled. But wouldnt fouled plugs miss when i revved it in park or during light acceleration?

Im going to pull a few plugs later today to have a look at them. So does this sound like a coil or plug issue to you guys? Truck info in sig. 90k on the clock.

 

Ive been reading on the mustang forums and it seems quite a few guys have had luck just changing out the connectors to the Granatelli ones. That worked for many people who never had a CEL show up from the missing. Since i cant get a CEL to show for the life of me, i may give them a try and hope for the best.