Compression Ignition Addict
Join Date: Jun 2014
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On the surface, it sounds like a fuel starvation problem. There are other things that could cause those symptoms, but I'd start by checking fuel pressure. At idle the pressure should be roughly in the 55-65 range, and should stay pretty close to that under load. There is a test port on each head with 1/8" NPT threads, and there's a port on the filter housing, low on the right (passenger) side near where the fuel lines exit to the heads. That port takes a #4 o-ring boss fitting.
While you're under the hood, check to make sure the solenoid and spacer are still secure on the IPR and the nut that holds them is tight. You can also disconnect the wiring connector on the ICP sensor and take it for a drive to see if there's an improvement.
Last edited by Pikachu; 07-05-2014 at 10:05 AM.