Check engine light at startup with rough idle - Ford Powerstroke Diesel Forum
 
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post #1 of 7 Old 08-14-2013, 10:20 AM Thread Starter
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Check engine light at startup with rough idle

Diesel newb here,

When I start it up the CEL lights up and the idle is a bit slow. If I let it idle, the CEL will turn off in 1-2 minutes and the idle will pick up a bit and even out. Sometimes the engine dies when the CEL turns off and the idle picks up. If I turn it off immediately after starting and restart, the CEL doesn't turn back on and it runs fine.

No codes as I took it to my local shop and their diesel tech couldn't read the computer. He said that he thinks the computer is bad.

95 ECLB 2WD E4OD

Any help or thoughts appreciated.

1995 F250 7.3l PS Ext. LB 4x2 +200k (no mods yet)
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post #2 of 7 Old 08-14-2013, 10:42 AM
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Unless his scanner is programmed specifically to read the Ford Enhanced PIDs/codes associated with the OBS PSDs, he has no idea whether your PCM is good or not. If the CE light is on, there are codes. You need to find a scanner that is known to be able to communicate with our trucks.
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post #3 of 7 Old 08-14-2013, 12:10 PM
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Computer is most likely fine (for reasons madpogue mentioned and it is running). Is it idling slow, but evenly? Or uneven (like a couple of cylinders are missing)? You might want to inspect the external valvecover connections for evidence of burning or melting. Also, remove the oil cap a take a sniff of the cap. If it smells like burned electrical insulation, you probably have issues with the under-valvecover wiring harnesses (UVCHs). Cheers!

1997 F250 SC 4x4, E4OD, 4.10 LS, Basically Stock, Relocated Block Heater Plug, External Trans Filter, Tru-Cool Max, I/C Mounted but not Plumbed

SOLD - 1994 F350 CC DRW 2WD PSD, 5 Speed, 4.10 LS, SBC Con-O, Baldwin Filter, Tymar HPX Hose, DPPI DP, Bilsteins, $12 AIC, Coolant Filter, Explorer Overhead Console, A-Pillar w/ISSPRO Black Ice, EV Boost, and EV Pyro, Modified Pedestal, Gutted EBPV.
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post #4 of 7 Old 08-14-2013, 12:39 PM Thread Starter
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It runs smooth, just lower rpm.

1995 F250 7.3l PS Ext. LB 4x2 +200k (no mods yet)
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post #5 of 7 Old 08-19-2013, 04:39 PM
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unplug your ICP, see if there is oil in the electrical connector. just replaced mine with same issues.
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post #6 of 7 Old 08-20-2013, 11:16 AM Thread Starter
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There is indeed oil in the connection. Can I clean it out and be good to go or is there other problems now?

1995 F250 7.3l PS Ext. LB 4x2 +200k (no mods yet)
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post #7 of 7 Old 08-20-2013, 12:13 PM
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It means the sensor is leaking "internally" (so it needs replacement). Cheers!

1997 F250 SC 4x4, E4OD, 4.10 LS, Basically Stock, Relocated Block Heater Plug, External Trans Filter, Tru-Cool Max, I/C Mounted but not Plumbed

SOLD - 1994 F350 CC DRW 2WD PSD, 5 Speed, 4.10 LS, SBC Con-O, Baldwin Filter, Tymar HPX Hose, DPPI DP, Bilsteins, $12 AIC, Coolant Filter, Explorer Overhead Console, A-Pillar w/ISSPRO Black Ice, EV Boost, and EV Pyro, Modified Pedestal, Gutted EBPV.
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