I have an old RV E-350 that I was getting ready for a camping trip. For days I would crank it and let it run, but a little over a week ago it won't start.

So far, I've replaced the battery, coil, spark plugs, spark plug wires, distributor cap, and the rotor with all-new parts.

I've used a volt-meter to make sure my wires are supplying the 12V to the distributor and coil. It still will not start. Any help will be much appreciated!

 

It would either be a bad PIP sensor or ICM or PCM.
If I were guessing I would say PIP sensor.
You would just have check it out and find out the one causing the no spark problem.

You checked it and you have no spark, right?
And you have ruled out it being a fuel problem?

 

Yes, it isn't getting any spark when I used my spark tester on the high tension lead and it won't start with ether either.

 

Unplug the PCM Computer and see if spark returns.