A couple of months ago I posted my problems I was having with misfires under load. I changed a bunch of stuff, updated some wiring, even sent Lito some data logs.
As it turned out, the brand new MSD coil on plugs would work both on a bench test, and light acceleration to 40 mph. Once over 40, or over half throttle, they would misfire severely. I eventually replaced them Motorcraft COPs and the car runs great.
I called American Muscle about a return, but it was outside of the 30 day window, so I had to deal with MSD. I called, got the return authorization, and sent them in requesting a refund.
Tonight, I received the same COPs back saying they all tested normally.
No wonder MSD stands for “My Spark Died.”
As it turned out, the brand new MSD coil on plugs would work both on a bench test, and light acceleration to 40 mph. Once over 40, or over half throttle, they would misfire severely. I eventually replaced them Motorcraft COPs and the car runs great.
I called American Muscle about a return, but it was outside of the 30 day window, so I had to deal with MSD. I called, got the return authorization, and sent them in requesting a refund.
Tonight, I received the same COPs back saying they all tested normally.
No wonder MSD stands for “My Spark Died.”