2003 6.0 MPG Down and no power when cold. - Ford Powerstroke Diesel Forum
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Old 10-14-2013, 05:55 AM
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2003 6.0 MPG Down and no power when cold.

Hey guys, need a bit of help. Searching around helped a little bit not enough to not warrant a thread.

If I let the truck sit for 4-5+ hours, refuses to go over 2k rpm and sometimes blows blue/white smoke. Have a video of that issue. Once it warms up truck is 100%normal.
Also have an issue with my mpg's. Should I be constantly getting 11-14 mpg? I know my fathers 05 6.0 gets around 17-18 all the time, and its larger than mine.

Got the truck about a month ago, has 73k on it. Any of this be FICM, bad ff return spring or stuck EGR related? I have no monitor yet for the truck, so how could I check all my voltages/psi all that. My uncle has a bully dog tuner laying around for the 6.0 and would that be able to check all my voltages?

Im running full sythetic oil (changed 1k ago) and dud the fuel filters at the same time, only new thing i put on the truck is a 4" turbo back exhaust. I've already ran a bottle of seafoam and am curre fly running a bottle of cetane through the tank, but so far no luck.

Here's the video for the startup issue
Sorry for the link, on my phone at work.
https://www.youtube.com/watch?v=W2xW...e_gdata_player

Last edited by lolwutderp; 10-14-2013 at 06:00 AM.
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Old 10-14-2013, 06:20 AM
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Sounds like an injector issue but I'm not well versed on the 6.0's as the 7.3's.

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Old 10-14-2013, 06:30 AM
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Any good scanner will be able to check FICM voltages. Make sure you check voltages while truck is cold. 48 volts.
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Old 10-14-2013, 06:32 AM
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Quote:
Originally Posted by Fummins90 View Post
Any good scanner will be able to check FICM voltages. Make sure you check voltages while truck is cold. 48 volts.
But his problem goes away once warmed up???

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Old 10-14-2013, 06:45 AM
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Originally Posted by hucorey View Post
But his problem goes away once warmed up???

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I'm just trying to rude the FICM out completely.
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Old 10-14-2013, 07:09 AM
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Thinking about it, I know the alternators go bad prematurely, could it be that at start up my truck doesn't have the proper voltage, and as it warms up it supply more power to the FICM, I know a bad alternator killed my father's FICM.

I will check later and get and update thanks!
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Old 10-14-2013, 07:20 AM
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Check those batteries as well.
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Old 10-27-2013, 11:48 AM
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OK update, checked my FICM today, steady between 48 and 48.4 volts, tested it twice. Alternator pushing out 13.2 volts without batteries, and batteries being a month old both read within the 12.78-12.83 range.

Should I do a new oil filter, only has 1000 miles on this oil, which was just switched to synthetic. Or should I check my fuel filters again?
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2003, 6.0, coldstart, lowmpg, nopower

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