I don't know. Where is it on the truck, if not in the engine compartment? And, how do I test it? If it is in the cab under the dash, it should be fine. Because I didn't have this issue with the old engine. When I crank it, usually the number one cylinder will fire, and the others won't. Usually if 2 cylinders fire, it will run. It's almost as if the spark is not great enough until it is running. It runs fine as long as it is warm and the idle is not too low. It's just mainly when it is cold does it cause such issues.
