1997 F-250, 4.6L. We had a month of very wet weather. I wasn't driving the truck because I was working on the windshield wipers. One day it was so bad the inside of the truck windows were fogged up, even though it was closed up. It was really damp! When the weather cleared I went to drive it. It turns over fine but there is not even a hint of it firing on any cylinder. Either there is no spark anywhere or no gas being pumped. There are no engine codes. Can someone point me in the right direction as to where to look first? Is this likely a coil problem?

Help is appreciated!

 

Start by doing a search on "GEM". Lots of info on the subject.

 

Thanks for the reply.

I must be dense...I searched for GEM and found lots of posts on electrical problems, but none that match my symptoms. I have no electrical problems except it won't start. It turns over just fine with the starter. The lights and gauges all work. There is plenty of juice in the battery. It just doesn't even try to start.

I got a Haynes manual and it said to check fuel pump, lines, and for water in the gas, then run a bunch of ignition checks. I think I need a mechanic :-)

 

Good, glad you don't have any GEM problems. So have you checked for fuel delivery problems? If not put a fuel pressure gauge on.