FICM Values, concern? - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 10 (permalink) Old 06-22-2019, 03:00 AM Thread Starter
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FICM Values, concern?

Hey letting my wife take my Ď03 Ex 6.0 on a 3hr trip while Iím out of town. We went through DQ tonight and I noticed these FICM values. Let me know if Iím worried over nothing or if I need to get some stuff fixed. Think Iím just paranoid cause she is taking some of her students to a competition. Donít want píd off parents..

It seems to run/idle just fine. Only noticed it cause I was boarded waiting on someone to get their food.

Batteries are brand new.

At idle:



At 40mph right out of idle:


Key on engine off:



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post #2 of 10 (permalink) Old 06-22-2019, 04:29 AM
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Re: FICM Values, concern?

Looks good. If your FICM output voltage is within a two volts of 48V, you are fine. The jumps from 12.5-14.5 just reflect the load on your battery and charging system.
If Iím wrong, someone please let me know. I have the same numbers most of the time.


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post #3 of 10 (permalink) Old 06-22-2019, 12:31 PM Thread Starter
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Re: FICM Values, concern?

Ok I figured it was, I just havenít seen the logic power below 13.5 before. However that makes sense, Iím sure Iíve just never noticed.

I wouldnít be so concerned but my wife drove it to her moms yesterday and it drained all of its coolant in her driveway... it only has 66kmiles BUT time is a cruel mistress when itís 16 years old.


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post #4 of 10 (permalink) Old 06-22-2019, 10:23 PM
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Re: FICM Values, concern?

Agreed
it was withing 1/2 volt of the input voltage so i wouldn't worry

usually you see the main V drop when these start to fail

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post #5 of 10 (permalink) Old 06-23-2019, 01:19 PM
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Re: FICM Values, concern?

Iíd be a little concerned about the alternator output. At idle, I stay at about 13.4-13.5v and run between 13.8-14.1v going down the road. Last time mine dropped below 13v it wasnít long after that, my alternator went out.
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post #6 of 10 (permalink) Old 06-23-2019, 06:56 PM Thread Starter
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Re: FICM Values, concern?

And normally thatís what I see on mine, but it never got below what I sent. Could just be the alternator backing off for the time I was watching it...

However I will keep that in mind.


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post #7 of 10 (permalink) Old 06-24-2019, 12:03 AM
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Re: FICM Values, concern?

output in image #1 and 2 looks completely normal for start up and the GP cycle

image #3 is good for after the GP time out

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post #8 of 10 (permalink) Old 06-24-2019, 01:13 AM
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Quote:
Originally Posted by Zmann View Post
output in image #1 and 2 looks completely normal for start up and the GP cycle

image #3 is good for after the GP time out
Yeah, but I. #1 & 2 he had driven to pick up food and the truck was up to full temp. 12.5v at that point is low to me.
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post #9 of 10 (permalink) Old 06-24-2019, 04:41 AM
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Re: FICM Values, concern?

even warm they can still cycle but if he didn't just start the truck in the last minute to move forward in line then you are correct that is low

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post #10 of 10 (permalink) Old 06-24-2019, 06:34 PM Thread Starter
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Re: FICM Values, concern?

Yea I like to set with it running, really pisses people off. Special when my brother in law was behind me in his Tesla.


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