2004 6.0 rough start and no power when cold - Ford Powerstroke Diesel Forum
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Old 11-18-2009, 05:13 AM
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2004 6.0 rough start and no power when cold

My 2004 6.0 runs rough when it is a little chilly (not cold by any means). I have to let it warm up for a couple of minutes before it has enough power to even get out of its own way. Does anyone have a idea what I can check first? Thanks
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Old 11-18-2009, 05:14 AM
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Just a few more details. The truck has 80k on it no motor work has ever been done and it is bone stock.
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Old 11-18-2009, 06:08 AM
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Make sure you have the latest FICM calibration.
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Old 11-18-2009, 06:49 PM
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Your Glow plug relay may be bad I had that problem in mine.
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Old 11-19-2009, 03:05 AM
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Where is the GPR on that motor. Is it close to where the 7.3 are?
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Old 11-19-2009, 05:30 AM
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Actually it isn't a relay, it's a Glow Plug Control Module. I think it's a solid state module unlike the 7.3 that actually has a relay.

Getting the latest calibration will help with cold starts. It uses the coils in the fuel injectors to inductively heat the injectors. I had my doubts about it when Ford came up with that one, but it seems to do a good job.

The other possibility is that the turbo is coked up and needs cleaning. There are moving parts in the exhaust side that get cruddy and rusty and don't really work well till it gets warm. The way you fix it is to remove the turbo, break it apart, Scotch-Bright the crap out of it and put it back together. There is a tutorial online about that.

One last thing, is it still under warranty? Depending on the date of purchase, the 5 year 100,000 mile warranty might still be in effect. It's worth a check.

Last edited by elibenson; 11-19-2009 at 05:32 AM. Reason: One last thing..
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