Performance Problem - Ford Powerstroke Diesel Forum
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Old 06-01-2009, 04:57 AM
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Performance Problem

Hello,

I noticed a problem the other day when I was driving my vehicle and wanted to see if anyone had any suggestions of what might be the cause and the solution. Normally I only drive around town and I tend to keep the vehicle under 2k RPMs however the other day I was driving on the interstate and noticed that I lose basically all power output from my engine when I reach between 2250 and 2500 RPMs. At the moment 2500 RPMs sounds more like 3500 RPMs and when I was on the interstate while I was trying to get up to speed I tried flooring it at one point but was gaining very little speed and at an extremely low rate. Anything under 2k RPMs seems output is just fine and I have tried rev'ing the engine when in neutral and it sounds fine even beyond 2k RPMs but at the same time, it isn't trying to move 9000 lbs of truck when its rev'ing in neutral. Only thing that has changed recently is I started using biodiesel again a few tanks ago and I think its cleaning the crud out of my tank left behind from petro diesel and the fuel filter is doing its job and catching all that crap but I would rather hear some other opinions before any work gets done on my truck.

Thanks in Advance!

//EDIT

Forgot to mention, I have an '05 Excursion
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Old 07-04-2009, 05:51 PM
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fuel filter

Had a similiar problem on a trip to SD. Changed fuel filters in Mobridge, SD and that solved the problem. That was 50,ooo miles ago.
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Old 07-04-2009, 05:58 PM
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I was going to say the filters and also i would check to make sure the bio is not to thick. i have done that befor. if the bio is to thick then you will need to change the filters and thin it out.
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