PCM problem? - Ford Powerstroke Diesel Forum
 
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post #1 of 7 Old 02-06-2014, 07:13 PM Thread Starter
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PCM problem?

Last year I bought a used 2002 F-250 diesel. It is in great shape with 78,000 miles. At least five times in the last six months since I got it, it has shut down while I was driving it down the road. I lose acceleration, then a few seconds later the engine stops. Check engine, water in fuel, check gauge, and battery lights all come on, but go off as soon as the engine is started again. Gauges are all normal before and after it turns off.

They told me that if I stopped, put it in park, turned the key one click back, kicked the PCM, and tried to start it again they would be able to get codes to determine the problem, but the engine light doesn't stay on long enough to store a code. They have let it run at the dealership, but haven't been able to replicate the problem so they are thinking that because it will start after I kick the PCM that is the problem.

But before I spend $1000 a new PCM that MIGHT fix the problem, I wanted to see if anyone has any other theories.
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post #2 of 7 Old 02-07-2014, 06:33 AM
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WOW! You've been give some really Bad Info from where ever you're taking it....

Step #1 would be to find a more knowledgeable repair facility

ANYTIME the light comes on while running there is a code stored, there's no "time" requirement". BUT it often takes a professional scanner to retrieve codes from our trucks. A regular, OBD-II scanner will come back "No Codes Found" when a proper scanner will not.

They told you to "Kick the PCM" ?? Physically? So they think you have a bad connection and that's their solution? OR, they believe there's a mechanism that's built into the PCM that needs to be activated by kicking it?

Either way, they're CLOWNS and doing you no good, I'm tellin' ya, find somebody else to look at your truck...

This could be a CPS problem (very common) a connection problem, All sorts of things but the first place to start would be the right diagnostic/scanner
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post #3 of 7 Old 02-08-2014, 04:47 PM Thread Starter
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I've had it to two Ford dealerships now and both said they couldn't get codes off of it. Apparently, a technician from Ford (not just an affiliated dealership) was there the last time I took it in and he didn't have any answers either. Their theory behind kicking the PCM was that there is a bad connection.

I just moved, so I'll see what I can find here, I've heard that there is a good diesel tech at the local dealership.

Thanks for your help!
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post #4 of 7 Old 02-09-2014, 06:12 AM
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sounds like what noralph said.

cps first then check wiring.

sounds like a bad cps though.

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post #5 of 7 Old 02-09-2014, 06:24 AM
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there is a ground eyelet behind the kick panel near the door jam that I have seen fail and exhibit these same symptoms.

it is also common for the ebp tube to rust out and allow hot exhaust gasses to escape causing the tube to generate enough heat to melt the tiniest spot in the CPS wiring and then the wiring shorts to the ebp tube
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post #6 of 7 Old 02-16-2014, 03:18 AM
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Any updates?

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post #7 of 7 Old 02-16-2014, 05:06 AM
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