Quote:
Originally Posted by HBG
Thinking maybe o rings are bad on injectors and oil is thinner so they dont fire as well not sure though but its getting worse.
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That's a definite possibility. The cold oil won't leak as much because it's thicker, and when it gets up to temp, it may leak enough so that the HP oil doesn't get up to the required starting pressure (500 psi).
If you can get a PSD capable scan tool on it, monitor ICP and IPR duty cycle when cranking. If IPR duty cycle gets above 85% (I think that's the limit), then you most likely have a HP oil leak under the valve covers.
Also try pulling the ICP sensor wiring connector off to see what happens. If the sensor is biased (telling the computer that the pressure is actually higher than it really is), it might cause the IPR to dump pressure. Pulling the wiring connector off makes the PCM use default control values.
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First truck -- 1929 Model A Ford pickup, restored from ground up. Wish I still had it!
99.5 F250 PSD Supercab LB 4x4, ZF-6 w/SB Con OFE, 3.73LS, Boost & pyro gauges, Swamps S175/146 injectors, DP 80 HP Econo PCM (classic version
), AIS,
coolant filter w/"hokum" bracket, regulated return,
heated mirror mod, lighted cupholder, Marinco heater plug-in.
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