I had visible spark on the plug i checked. I suppose I could use a test light to verify all the plugs

 

Coil voltage will smoke your test light.

See what kind of spark you are getting from the coil, It should be a nice, fat, blue feller, that you can clearly hear SNAP when it jumps.

 

Well, the spark was blue it only ever sparked once though when i was turning it over. and then it quit sparking. I know the trucks prefer stock sensors, are they testy about the coils as well? When I was having problems I had put an MSD coil on. which fixed it for all of 50 miles or so.

 

Well, the PCM is whining about the coil primary circuit, so, either bad coil, bad wiring, or bad pcm..... check the entire circuit, see what you find. You may even be able to test the circuit with the noid light..... If that all looks good, replace the coil.

 

Well the connections to the coil were a little dirty. Got it cleaned up and it fired.... sorta

Um it will run, but it is almost as if it is running super rich. and boggs down and dies if it gets any gas. For ****s and giggles we did a compression test, and cylinders 7 and 8 have next to no compression, like under thirty and 50. Not sure if that is new or not since the truck ran fine under its own power to where
it is parked.

 

Try a wet test. They may have just been washed down by gasoline.

If it is running really rich, check the temp sensor for the PCM. Should be right next to the thermostat housing.

 

I have an airgap intake, I believe that is the sensor that has been relocated. The computer is talking to the sensor. Not sure how to test the sensor itseld. I'm also not familiar with a wet test, what is that?

 

You're wetting down you're cylinder. Spray a little WD40 or a good penetrating oil or engine oil if it's all you got, (I use spray oils to avoid the aggravation, especially with the plug shields) down the evacuated spark plug hole. It'll fill the "bad spots" on your compression rings momentarily to help you determine if the rings are shot or not. If your compression goes up, n this will be very temporary depending on the condition of the rings, especially if it goes up allot, your rings are shot, unless they're broken...

 

Oh yeah, then repeat the compression test.

 

Intake air temp sensor is the one that gets relocated.