Hpop,fuel pressure,bleeding?
yeah, i can see how icp and ipr are so easy to hit the wrong keys being on different sides of the keyboard. 
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Just for clarification.. this is from Diesel Mans Page....:
I think this pertains to rough idle...
The remaining tests require either an OBD II scan tool or a break-out box and a DVOM. First check Injection Control Pressure stability at idle. The ICP PID reading should be 550-700 on non-California F-series, 97 and older, and 400-600 on all others--or .25 volts KOEO, .75-1 volts at idle, .83 volts require to start at pins 87(ICP sig) to 91(sig ground). Low readings could be caused by poor oil, internal oil leaks, or a high pressure oil pump, ICP or Injection Pressure Regulator malfunction. Isolating the cause can be done by disconnecting the ICP (the PCM will default to an ICP reading of 700 PSI and use other inputs for IPR control) and/or installing a high pressure oil gauge to monitor ICP pressure directly. If the concern is a rough, uneven idle that smooths out after disconnecting the ICP, The problem is most likely either the ICP malfuntioning or the IPR sticking. The manual says to replace the ICP first, but I have found that it is usually IPR. If you ever encounter an engine that runs with the IPR valve disconnected, the IPR is definitely sticking.
Hope It doesn't make trouble....
I think this pertains to rough idle...
The remaining tests require either an OBD II scan tool or a break-out box and a DVOM. First check Injection Control Pressure stability at idle. The ICP PID reading should be 550-700 on non-California F-series, 97 and older, and 400-600 on all others--or .25 volts KOEO, .75-1 volts at idle, .83 volts require to start at pins 87(ICP sig) to 91(sig ground). Low readings could be caused by poor oil, internal oil leaks, or a high pressure oil pump, ICP or Injection Pressure Regulator malfunction. Isolating the cause can be done by disconnecting the ICP (the PCM will default to an ICP reading of 700 PSI and use other inputs for IPR control) and/or installing a high pressure oil gauge to monitor ICP pressure directly. If the concern is a rough, uneven idle that smooths out after disconnecting the ICP, The problem is most likely either the ICP malfuntioning or the IPR sticking. The manual says to replace the ICP first, but I have found that it is usually IPR. If you ever encounter an engine that runs with the IPR valve disconnected, the IPR is definitely sticking.
Hope It doesn't make trouble....
Last edited by Action4478; Oct 15, 2007 at 04:39 PM.
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