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6.4L Power Stroke Diesel Engine fitted to 2008 - 2010 F250, F350 and F450 pickup trucks and F350 + Cab Chassis

F450 Problem

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Old Mar 30, 2009 | 03:34 PM
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Jeff02PSD
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From: Lithia, FL
F450 Problem

Truck info is... 08' F450 4x2, Auto, 6.4L, 4.88's. Job 1

While driving my truck this morning a problem occured. Anything over 1/4 throttle or ~ 2500 RPM and it acts like it has hit the rev limiter. It starts up/idles normal and has normal power/acceleration unless you press the throttle more than ~ 1/4 way or exceed ~ 2500 RPM.

I was not really thinking it could be bad fuel because I filled up early in the morning and put about 35 miles on it before I had the issues above. There was less than 1/4tank when I filled it up so most of the fuel I drove the 35 miles on was bought this morning. There was another guy at the dealer with me with a 6.4L and had identical problems and he stated his seperator had water in it. I checked mine and had almost no water (no warning lights on dash except the check engine light).

Any help will be greatly appreciated. The truck is at a local Ford dealer now but this is really bothering me and would like any information. Thanks in advance for your help!

Jeff
 
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Old Mar 30, 2009 | 03:37 PM
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Jeff02PSD
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Sorry,

Sig is missing. Dont know why.

Truck is 08' F450 4x2, Auto, 4.88's. Job 1
 
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Old Mar 30, 2009 | 06:53 PM
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eng was in limp mode. Why is the question. the pcm put it in limp mode because something in the motor is out of spec or a bad sensor something like that.
 
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Old Mar 30, 2009 | 07:38 PM
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Jeff02PSD
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Thanks for the information Senix. I am hoping that I find out something from the dealer tomorrow.
 
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