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post #1 of 8 (permalink) Old 02-14-2015, 04:49 PM Thread Starter
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diesel shop said bad ficm? is it?

Tried a new shop to troubleshoot my truck. Hard start, rough running, 0-60 in a minute and a half, tops out around 65. It's been running a little rough for a while, but the loss in power started last week. The shop said a bad ficm. I ordered the Dorman power card and was going to change it. I checked the voltage, and it shows 49-50 the whole time. Should I forgo the power card and just order a new ficm, or check something else?

It's giving codes for low circuits on 2, 3, 5, and 8, and high circuits on 2 and 8. Thanks.
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post #2 of 8 (permalink) Old 02-14-2015, 05:02 PM
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Re: diesel shop said bad ficm? is it?

A: don't use Dorman anything
B: what are the ficm volts koeo,starting,idle, and at 2500
The fact that you have multiple injector codes would lead me to believe it is electical (ficm, ficm connection, injector harness) also how are your Batts and alt?

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post #3 of 8 (permalink) Old 02-14-2015, 05:32 PM
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Re: diesel shop said bad ficm? is it?

that dorman FICM while cheap and Dormans track record sucks seems to be doing ok to get some folks by until they can say send their power supply off to Ed (Dorman= no core IIRC ) or get a BPD unit

but with those voltages I would be concerned it's not the FICM but those codes are like Kdavid said pointing in that direction
however if they guarantee it is the problem then maybe it's worth it depending on price since you know it's not leaving the shop without some fee's anyway

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post #4 of 8 (permalink) Old 02-14-2015, 08:01 PM
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Re: diesel shop said bad ficm? is it?

Agreed on the dorman as a get you buy until.

2006 F350 4X4 CAB CHASSIS w/ Truck Bed
Blue Spring, Mishimoto tstat
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post #5 of 8 (permalink) Old 02-15-2015, 01:52 AM
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Re: diesel shop said bad ficm? is it?

Sounds like injector harness issues to me, are the plugs seated well in the back of the FICM?


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post #6 of 8 (permalink) Old 02-15-2015, 07:05 PM Thread Starter
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Re: diesel shop said bad ficm? is it?

Alternator and batteries tested bad. Replaced all and it's acting the same. Going to try the FICM power module, I guess.
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post #7 of 8 (permalink) Old 02-15-2015, 08:14 PM
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Re: diesel shop said bad ficm? is it?

These trucks do have a cascade effect. Bad at and batteries can toast the ficm so it looks like that is the case with yours. Definitely stinks but just how it goes and shows the importance of monitoring things and catching them before they damage more stuff. Don't be shocked if you get the ficm taken care of then have contribution codes come up from toasted injector selinoids

2006 F350 4X4 CAB CHASSIS w/ Truck Bed
Blue Spring, Mishimoto tstat
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post #8 of 8 (permalink) Old 02-16-2015, 05:18 PM Thread Starter
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Re: diesel shop said bad ficm? is it?

Okay, I tried the replacement power module, and no change. Is there a way to test the logic before I send the FICM off to fixmrepair.com? How can I test the wiring harness?

I really hate to parts swap... I don't have the money to waste.
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