Join Date: Apr 2008
Location: Moyock, NC
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I have conflicting RPM values also. Here is an exerpt from one of my cheat sheets. One line lists 100 and another lists 175.
Several parameters are necessary for starting, not including glow plug operation and good compression.
1. ICP 520 psi min. (0.8v minimum)
2. PCM sync = Yes which means that the CKP and CMP sensors are sending a signal to the PCM and are working correctly.
3. FICM sync = Yes which means that the PCM and FICM are in sync
4. Pulse Width signal to the injectors
5. Minimum cranking speed of 100 rpm
-The fuel supply pump has an inertia switch in the circuit, located under the passenger side kick panel
-Try unplugging the ICP sensor it can cause a not start problem without setting any codes
-Monitor the oil pressure gauge on the dash, it should move up during cranking. If it shows no oil pressure then there could be a problem with the low oil pressure side.
-IPR duty cycle of 14% or less during cranking means no cam signal (and no sync)
-Check for loose connections at the FICM
-A shorted EBP sensor can cause the PCM to shutdown
-Glow Plug control module connector problems (pin tension, water intrusion, bent pins)
-Leak in the high pressure oil circuit, takes excessive cranking to build minimum ICP pressure, see ICP pressure.
-Minimum cranking speed should be 175 rpm cold and 215 rpm warm.
-Glow plugs; they should pull approx 170-180 amps total for a cold engine, which will drop to about 120 amps after about 15 seconds. If the amp draw is below 10-12 amps per glow plug then you will need to replace some glow plugs. CAUTION; upon removal of the glow plugs, the glow plug sleeve will sometimes pull out with the glow plug. This will require that the head be pulled in order to replace the glow plug sleeve.
-Injector spool valves sticky
- 2004 with a sticky intake throttle plate can cause a hard start.
-Glow plug harness chaffing
--Glow Plug control module connector problems (pin tension, water intrusion, bent pins)
05 F250 4x4 CC, 9.5" Rize/Icon, 38" Toyos, 20x12 Pacers, 5" MBRP, AFE stage 2, Cass 190s, Powermax, ELC w/filter, RCD EGR delete
04 Excursion 4x4, vacation bus
Project 1979 F250 6.0 powered in progress