Thread: Sluggish after coil pack install

From my understanding, the MSD Coil packs can sometimes not always get a good seating to create the electrical current needed. I know there was something on the other board about it and that something had to added, either washers or something to keep a good contact with the MSD Coil Pack.

I am sure someone else might have a bit more insight on that one than I do, but that was my understanding of the only real draw back between the MSD's and stock coil packs. And like Sabre said, GM used the same Coil packs for the 3800 NA and SC model engines. I can atest to that as that I have had both a GT and now my SC. They are the same. Different part #'s but still the same make up.

Originally Posted by GeddyLee

Different part #'s but still the same make up.

Yes, I should've clarified. The internals have the same part number and are the exact same part, but for some reason GM slates a different part number for each RPO of engines.

FWIW, I don't ever plan on changing my coils unless they give me issues. They're actually pretty good since GM did their homework designing them. A good ignition system promotes efficiency, fuel economy, and lower emissions, so it was in their interests. I've heard such mixed results with other brands of coils that it all seems gimmicky. I have yet to see repeatable improvements.