APCM troubleshooting - Ford Powerstroke Diesel Forum
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Old 10-01-2007, 07:17 PM
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APCM troubleshooting

Scored myself a APCM, it is communicating with the PCM (buttons work, can set/choose an RPM and it'll rev up, charge protect will rev up the engine.) The problem I am having is when the unit is on, the LCD shows "0" for RPM, and on charge protect show ".0" for voltage. Do I need to have either the PCM or APCM reprogrammed to get this thing to work?
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Old 10-01-2007, 07:44 PM
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Buddy system

If you know someone with a compatible vehicle ask if you can borrow their apcm plug to see if your unit works on their truck. Or try their apcm in your truck. Easiest trouble-shoot I've ever used. ps sometimes chip mods interfere with computer ''reception''.

Last edited by spar-tool; 10-01-2007 at 07:50 PM.
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Old 10-02-2007, 11:40 AM
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Mine didn't work until i got my DP Tuner
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