I have been working on my friend's truck here and there for a while now. He called me today and said that the truck crapped out and wouldn't restart.. I went to look at it and had good fuel pressure but no spark.
I gave the engine a reacharound and shook the harness going to the crank position sensor. The truck started right up, but randomly runs rough and still has random no start.
The CPS affects the running of the engine in that either it works or it doesn't, correct? I could see the wiring being faulty, but I can't see it causing a rough running situation. Correct me if I am wrong, please!
He did tell me that he has been running the tank pretty low lately, thanks to Obama, so trash in the fuel filter could be partially to blame for the roughness..