This is where I am puzzled. The secondary reading is within spec but for the life of me I cannot get a reading on the primary. Now correct me if I am wrong but the truck wouldn't run if there was a short in the primary, correct? I might have been doing it wrong. I am going to check on my lunch break this afternoon. Any help would be greatly appreciated.
You should be able to get a reading on the Primary.
Does the missfire/no power over at WOT only happen when the engine is cold in cold weather, or will it run fine until the air temp drops below freezing?
How long do you let the truck warm up when temps are sub freezing?
