Msd 7?

[Robert Simpson]

Originally Posted by twrs2006

Yes it is possible under load. What coil are you running with the 7al box? If it is the MSD 8201 coil loose it or donate it to a friend! You want to run the MSD 8251 coil with the 7 al box it will get everything out of the box and it is a better match. The MSD 8201 coils heat up and looses performance from the get go. The next place to look is the Ignition On (IGN ) terminal make sure the voltage stays rock steady no drifting. The boxes will drop there output perforance as this voltage drops. Check that you have clean and tight connections to All points on the box. How old is the coil wire? we have seen an increase this year of coil wires causing issues like yours at the worst possible times. Pull off the Dist cap and check & clean out, you can use a electronic spray cleaner. Most auto parts stores carry it, it is usually marked as Alternator/ Starter cleaner.

Pat, is correct he helped me earlier this year. Took his advice changed the coil and a couple other connections, the car came around and the plugs cleaned right up. I will go back to Pat in the future for ing upgrades. By the way I had all new 7al2 box 8201 coil wires etc, chased problem for over a year changed the box and coil with another new units, wires, coil wires etc, no help until I spoke with Pat.