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post #1 of 21 Old 01-28-2014, 03:41 AM Thread Starter
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Ficm

So I got my livewire ts last night and hooked it up. Start the truck this morning and it reads fixn at 24v the only time it shows above 46v is when idling. When on the throttle or moving it's all over the place. What do you guys think? I have not tuned the truck it's still stock just monitoring right now. Here's a pic of 45 mph cruising.
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S&B CAI
Diamond eye 4" Turbo back
6.4L banjo bolts
Blue Spring upgrade
Livewire ts 5015
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post #2 of 21 Old 01-28-2014, 03:43 AM Thread Starter
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Here's one just idling parked at work.
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S&B CAI
Diamond eye 4" Turbo back
6.4L banjo bolts
Blue Spring upgrade
Livewire ts 5015
2014 bed
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post #3 of 21 Old 01-28-2014, 05:15 AM
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Call Ed at ficmrepair.com...

Betcha your due for a repaired or new FICM... It must stay above 46v at all times.

You MIGHT try to check the plugs to ensure that they are plugged in snug...

Any issues with the truck running? Starting?
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post #4 of 21 Old 01-28-2014, 05:19 AM Thread Starter
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Only issues are when it's cold. Once it warms up its great. I'm gonna check connections this afternoon. If I have it plugged in it'll start when it's freezing out no problem. If it's not plugged in there's no way in hell it's gonna start.

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post #5 of 21 Old 01-28-2014, 05:21 AM
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I am with ya there... Year round for me... I will be trading in a faulting 58v ficm to Ed and getting atlas 40 tuning while I am at it!! His website is amazing and you will learn a ton about FICMs...
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post #6 of 21 Old 01-28-2014, 07:17 AM
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Well your battery voltage is good, your alternator seems to be doing its job, which leaves a bad FICM to blame.

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post #7 of 21 Old 01-28-2014, 09:27 AM Thread Starter
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Originally Posted by SargentoPistola View Post
Well your battery voltage is good, your alternator seems to be doing its job, which leaves a bad FICM to blame.
I hope not. The guy I got it off of was running bad batteries though. I think they burnt the alternator up so the could've messed the ficm up too. I'm gonna check the connections though and go from there. Will the ficm voltages being low cause hard cold starts?

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post #8 of 21 Old 01-28-2014, 09:42 AM
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Originally Posted by firststroke View Post
I hope not. The guy I got it off of was running bad batteries though. I think they burnt the alternator up so the could've messed the ficm up too. I'm gonna check the connections though and go from there. Will the ficm voltages being low cause hard cold starts?
Yes
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post #9 of 21 Old 01-29-2014, 02:58 PM Thread Starter
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Ok I did the ficm repair today and the truck started without being plugged in when it was 30 degrees out. That would not have happened before.
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Blue Spring upgrade
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post #10 of 21 Old 01-29-2014, 03:11 PM
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Then you're officially good to go. 24v on throttle is beyond a bad ficm


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