2001 F250 7.3L Turbo Diesel Jumping RPMS, felt like slipping, losing power - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
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Old 12-13-2007, 09:41   #1 (permalink)
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2001 F250 7.3L Turbo Diesel Jumping RPMS, felt like slipping, losing power

I have a 2001 F250 7.3 tubro diesel
I have a bullydog 6 pos chip in my truck on economy setting

It has been jumping rpms every now and then for about 2 months only about 200 rpms and when going about 40mph it would only happen once or twice a week and then no more problems

Twice i was driving and my service engine soon light came on and it felt like I had no power. I took my foot off the accelator and back down and all was normal again. This happened twice exactly the same.

Just before I took it to the shop on my way home from home depot about 10 miles. I would give it gas and it felt like it was slipping or losing power. I took it to the transmission shop. They drove it two or three times and could not find anything wrong.

I have been driving seldom now that I have it back. The SES light would never stick but this is the codes they were able to pull at the transmission shop.

PO470 - exhaust pressure sensor circuit fault
P0476 - exhaust pessure control valve performance
PO605 - internal control module rom error
P1249 - wastegate control valve performance
PO603 - internal control module ram error

Any help would be great thanks
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Old 12-17-2007, 12:50   #2 (permalink)
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Re: 2001 F250 7.3L Turbo Diesel Jumping RPMS, felt like slipping, losing power

i've had simalar problems and it turned out to be the cps they are now for going out and ford has a recall on them now so i would call ford and see if they will cover it if you buy it your self your looking at around 55-150 dollars, there is also a new blue one out on puredieselpower.com that is supposed to be alot bettter then the stock one it goes for 107.00
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Old 12-26-2007, 09:40   #3 (permalink)
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Re: 2001 F250 7.3L Turbo Diesel Jumping RPMS, felt like slipping, losing power

Thank you very much. Ford is replacing the cps this afternoon free. Hopefully this solves the problem
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