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Old 03-03-2012, 04:02 AM
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Ficm voltage ?

My truck has been taking a little longer to crank over so I checked the ficm voltage. It was around 47.5 at start and when I put it in gear I noticed it dropped to 47 then 46.5 it never got lower than that. Does this mean my ficm is on its way out?
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Old 03-03-2012, 04:07 AM
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Yea, its freaking shot - JK. No sir. That isnt too bad. How are your batteries?
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Old 03-03-2012, 04:11 AM
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Lol I gotta get em tested. Dumb question but how do you go about testing them
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Old 03-03-2012, 04:55 AM
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Testing them is easy. Simply charge them up and take them to your local auto parts store to have them tested. Should be free
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Old 03-03-2012, 05:23 AM
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How's the whether where your at? Mine did that a couple times when it got around 30*F, think the glow plugs are just sucking up some extra juice for those cold starts. I just had to give it some time and my voltage would come back up once the plugs shut off and then I'd turn the key over.
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Old 03-03-2012, 05:46 AM
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mine was reading 38 at wot, anything around 42-45 is starting to go from what i read. time for me to upgrade to a 58v
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Old 03-03-2012, 06:39 AM
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According to ford if it ever drops below 46 it's time to replace
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Old 03-03-2012, 07:06 AM
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Yeah I haven't seen it get that low yet. I live in delaware and its been pretty mild this winter. All this week it hadn't got past 45 degrees. Maybe it's just all in my head. I'd say it usually takes around 3 to 4 seconds on a cold start
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Old 03-03-2012, 12:33 PM
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if it hasnt gone below that I wouldnt worry about it, mine drops below that, sometimes down to 39 ish volts on start up or the first few seconds but its on the list to get upgraded
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Old 03-03-2012, 02:48 PM
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Quote:
Originally Posted by macoyle View Post
if it hasnt gone below that I wouldnt worry about it, mine drops below that, sometimes down to 39 ish volts on start up or the first few seconds but its on the list to get upgraded
Are you saying that when you turn on the key, your volts drop to 39v, then goes up after? Have you counted to 10 and seen what they are? (after the key is on)
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