Crazy ficm, I'm in need of help - Ford Powerstroke Diesel Forum
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Old 03-16-2014, 01:17 AM
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Crazy ficm, I'm in need of help

Hi everyone! I have a '04 6.0 and I love this truck. I bought an edge cs programmer to mainly view what the truck was doing. I noticed the ficm voltage would drop from 48.0 to around 33.0 at wot. If it was in park and engine running it would always be 48.0. So I took the ficm out and re-flowed the solder at all the locations needed. I put it back in my truck and it would not start, so I checked codes and got lost communication with ficm. I got out of the truck and when I was checking to make sure everything was plugged in good on the ficm the case of the ficm touched the firewall and I heard my injectors buzz. As soon as I broke the connection it wouldn't start again. So I ran I wire from the ficm case to the frame and then I heard the injectors buzz again. Then I jumped in the truck and she fires right up and no more codes??? I'm not sure what to think about this I've check for bear or broken wires and found nothing. What do you guys think??thanks for any help!!
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Old 03-17-2014, 02:49 PM
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You lost the FICM ground, which should bolt to an intake stud on the drivers side of the engine toward the back.
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Old 03-18-2014, 04:37 AM
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I think so also, but the bolt and ground wire are still connected to the intake so it must have broke in the wire harness. I went and bought a nice chassis ground strap from napa for $5.00 and connected it to a mounting bolt on the ficm and the to the firewall and have had no problems since!! Also if anyone wants to know about the dorman ficm half shell it works great! I am at 48.5 ficmV and 49.2 injector power. No programming and it was only $130.00 at amazon.com or $180.00 at autozone.
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ficm, ground issue, no start

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