Compression Ignition Addict
Join Date: Dec 2007
Thanked 311 Times in 300 Posts
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You've got a Much bigger issue than oil....
You ever see the SES light? Can you find someone with a professional scanner to monitor the sensors with as it does this?
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.
Also maybe see of the HPOP reservoir is low on oil (take the Allen plug from the top and "dip" it with the wrench). Oil should be only around 1" down.