HELP with RPM/Speed - Ford Powerstroke Diesel Forum
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Old 03-20-2012, 08:00 AM
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Exclamation HELP with RPM/Speed

hello,

i recently traded for a 2002 f450 7.3l diesel truck and i cant figure out if this is a problem or if the RPM are supposed to be this high. the truck seems to do fine when driving in the city however when i get on the interestate is when i question the performance. when im doing a steady 70 MPH the RPM reads roughly 3, and it redlines at 3.5 so im thinking this cant be right? im not that familiar with diesel's so i could totally be wrong here.

so my question is, are the RPM supposed to be at 3 when im doing ~70MPH?

please let me know asap before i blow this thing up

EDIT:
and this is without any load...

Last edited by scottycex; 03-20-2012 at 08:04 AM.
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Old 03-21-2012, 08:40 AM
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Is the od light lite up on the shifter. I know on my f-350 my push button don't work and sometimes it will run high rpm when at 55mph. Anyways it doesnt shift into overdrive. I have to stop shut it off and wiggle the shifter and it works sometime.
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Old 03-21-2012, 10:10 AM
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that f450 probably has really low gears, i worked on one a few months ago and if i remember correctly, it was pulling about 3k @70mph
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