Hi again So now my "check engine" light comes on, stays on a few seconds and goes off. In a 30 minute drive yesterday it came on and off the whole drive, but I can't go get a "read" on it because it won't come on and stay on. It seems to be running fine, I'm afraid there's a problem and I don't want to find it when it's "too late".... The only thing I know that's wrong with the truck is that it needs a valve cover gasket and a new muffler (current one has HUGE hole in it...) Any ideas guys? Sensor? Catalytic converter stopped up?.....

 

I have the same problem. My cat was on when it started and I took it off but it still does it.

 

Pull the codes they are stored in the ecm if you dont have a code reader there's a sticky on here on how to use the jumper wire method.

 

I've tried both. No codes whatsoever

 

You should have least got an 111 for system pass.

 

Light doesn't have to be on for there to be codes.

 

Well yesterday I was almost stranded at the drug store. It wouldn't crank. It turned over and almost cranked several times, but cut off. It had a really scratchy noise while cranking, does this sound like a problem with the battery or the starter?

 

I eventually got it cranked, and home. I hope it cranks when I leave for work