edjolly
Sr. Member
Any opinions? My 75 seems to have a weak spark, under load it chugs (not lugs) badly like there is incomplete combustion. There is no miss, and I'm pretty sure the mixture is good. All is stock, and I'm thinking of upgrading--or was stock in those years fairly hot (I'm thinking GM HEI hot) and mine is just tired. The plug color is good, and the problem only manifests at 2000 rpm or less under load, like pulling grades.<br>Was the Ford ignition in those years reliable or is it a priority upgrade, like front discs?<br><br>Ed<br>