martingmc86
Member
- Joined
- Dec 10, 2022
- Posts
- 36
- Reaction score
- 4
- Location
- california
- First Name
- martin
- Truck Year
- 86
- Truck Model
- gmc sierra 1500
- Engine Size
- v8 5.0
I have an 86 GMC Sierra 5.0 with a MSD atomic 1 EFI have had an issue with my spark plugs, getting folded up after a couple hundred miles to get cover in black and truck runs like **** first, I thought it was my carburetor so I decided to swap it out to an MSD atomic one EFI and it runs great but after a couple hundred miles like I’ve said the spark plugs foul and goes back to **** what can it be? I rebuild the distributor and put new pick up coil new capacitor, spark plug module new rotor plugs and new cables and still does the same thing my distributor does not have a vacuum advance it is a ESC ELECTRONIC SPARK CONTROL came out of California, so it had smog regulations