Compression Ignition Addict
Join Date: Dec 2007
Thanked 253 Times in 244 Posts
Mentioned: 6 Post(s)
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Is it cranking fast enough? - it won't even TRY to start if cranking too slowly.
Next, you could try disconnecting the plug on the ICP sensor to set a default value for the IPR to run with. Did you check the plug and sheet metal nut going to the IPR?
That nut can vibrate off and allow the solenoid going over the valve to slide around. The wires going to the IPR can get brittle, crack, and short together. Make sure the
plug & wires look in good shape. Try "rapping" on the IPR with a screwdriver handle, sometimes if stuck, you can "free it up".
Do you ever see "smoke" out of the tailpipe while cranking?
Is your truck "chipped"? If so, remove it as a Test.
Anyway to get it on a professional scanner? (Unfortunately, it takes a special scanner to retrieve them and the Genreric OBD-II scanners like the Auto Parts stores use don't do us much good...)
On the right equipment you could monitor the HP oil sensors and retrieve codes.