ECM prices and what to buy? - Ford Powerstroke Diesel Forum
 
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post #1 of 4 Old 08-04-2014, 04:29 PM Thread Starter
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ECM prices and what to buy?

I may haver an issue with a bad ECM does anyone know where I can get a used one or who sells them reasonable and good ones? My issue with the key not turning truck off may be a bad ECM I am being told also how would I check to see if it is a bad ECM or possibly a bad ground somewhere may cause the key not turning off truck but it doers turn off tach and speedo / dash unit? thanks
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post #2 of 4 Old 08-04-2014, 07:52 PM
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A lot depends on the type of PCM and the programming code. Rock Auto usually has them reasonably (got one for my 94 for only $115 plus refundable core). If you happen to have a DPC-312 like my 97 (California Splitshot programming with E4OD trans), good luck as they are pretty hard to find! Personally I wouldn't think the PCM is your problem. There would have to be something external causing the power to "stay on" to the PCM. JMO however. 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 #3 of 4 Old 08-05-2014, 09:21 AM
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Extremely unlikely that's the PCM. But don't assume, TEST. Put a voltmeter on underhood fuse #22 while the engine is running; it should show voltage. Then turn the key back. Presuming the engine will still be running, check the meter again. If it still shows voltage, there's a problem with the ignition switch or wiring, UPstream of the PCM.

Could be something as simple as a sticking PCM power relay.
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post #4 of 4 Old 08-05-2014, 06:46 PM
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If it is running with key off, you could always pull underhood fuse 9 and see if that kills it. That would point to the sticking PCM Power Relay. 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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