2006 F250 6.0 No Start-New FICM-Good Batts- - Ford Powerstroke Diesel Forum
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Old 02-27-2013, 03:05 PM
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2006 F250 6.0 No Start-New FICM-Good Batts-

My '06 F250 6.0 won't start. Replaced ficm and batts have been charged to 100%. Ive read that starting RPM should be 200-250 rpm. Is this true? I'm just under 150 rpm when it's cranking. I've checked rpm via Scan Gauge2.

Thanks!
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Old 02-27-2013, 05:47 PM
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IIRC 100rpm is the minimum.
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Old 02-27-2013, 05:58 PM
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Minimum RPM for starting '06 F250 6.0

Ive read that 200-250 RPM is required for starting. My truck won't start after replacing the ficm. I'm showing 125-140 rpm on the scangauge2. The starter gets real hot after a couple of 10-15 second cranking periods. Batts are new and kept on smart charger. Before it quit it used to crank a lot faster.
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Old 02-27-2013, 06:05 PM
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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.

No Start
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
-FICM faulty
-Glow Plug control module connector problems (pin tension, water intrusion, bent pins)
Hard Start
-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)
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Old 02-27-2013, 07:20 PM
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Ficm replaced today, connections good. Disconnected icp, no start. Inertia switch? Hmmm. I'll check that in the am. I'll check ckp and CMP sync too. Checked ficm harness, no chaffing found(yet). This thing has me bugged! Its been running great with some cold start roughness or hard starts when it gets down to 20s but it always started. Then after driving it all day then parking it for two weeks it started and died three times. Hasn't hit once since then. Hot starts have been without a single problem. Codes for number 3&5 glow plugs with check engine light. Rough idle for less than ten seconds after cold start prior to this situation. Could the inertia switch need reset? Is this common?
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Old 02-27-2013, 07:22 PM
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[QUOTE=F250power6;4252890]Ficm replaced today, connections good. Disconnected icp, no start. Inertia switch? Hmmm. I'll check that in the am. I'll check ckp and CMP sync too. Checked ficm harness, no chaffing found(yet). This thing has me bugged! Its been running great with some cold start roughness or hard starts when it gets down to 20s but it always started. Then after driving it all day then parking it for two weeks it started and died three times. Hasn't hit once since then. Hot starts have been without a single problem. Codes for number 3&5 glow plugs with check engine light. Rough idle for less than ten seconds after cold start prior to this situation. Could the inertia switch need reset? Is this common? Thanks for cheat sheet!
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Old 02-27-2013, 07:25 PM
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That is just a small portion of the sheet. You are welcome. The inertia switch is highly rare.
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Old 02-28-2013, 07:06 AM
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Okay, checked the inertia switch. It's ok. ICP was zero. Unplugged ICP sensor 1600+PSI. CMP/CKP SYC=0 CKP position =0 FICM =48.0/48.5
Starting to think ckp/CMP sensors and icp sensor. Ideas?
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Old 02-28-2013, 03:35 PM
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Okay, replaced ICP senser. ICP reads low, 45psi. I checked and found this thing has block heater but no cord. Picked up a cord and plugged it in. Cranks 150-170 rpms. Oil pressure gauge not moving while cranking. Lpo problem? Hpo problem because lpo? No syc on ckp/cmp. These things can't have all failed at once.
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Old 02-28-2013, 03:38 PM
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Was the ficm replaced with one from ford? I think the ford ones come without programming. If it was repaired, double check the three connectors on the bottom and make sure they are snapped all the way in.
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