My 2004 dodge 3500 5.9l cummins is slow up hills i was hauling 11,000 pounds all together and i came to the hill and i put the pedal right down and it very slowly went up, but it is fine when in cruise control it climbs no problem
Check the connection between the accelerator pedal and the pump as there are two different operations at work . The accelerator cable linkage may be loose and not giving full throttle where as the cruise control is getting full throttle.
That seems to be fine it gets full travel when I got my buddy to step on the pedal I watched the linkage
That seems to be fine it gets full travel when I got my buddy to step on the pedal I watched the linkage another thing is when I let off the pedal a bit going up the hill it got a bit more power
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SOURCE: 2001 Dodge truck with Cummins diesel cruise control problem
Take it into Cummings agent and get them to put it on the check out box (in a KW its in the dash ) but they will be able to fix your problem in about 10 minutes.
Have a goodday
SOURCE: Stalls at low speed when in cruise control
You sould have recieved a "recall" notice in the mail about the cruise control for fire and failure issues. they are adding a fusable link where the cruise control harness connects to the brake master cylinder. if you have not had the recall performed yet you should SERIOUSLY consider getting it done, mainly so it doesnt catch fire, but "could" be the result of the failure you've been experiancing! btw, almost ALL Ford vehicles have been affected with the cruise control recall. hope this helps!
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it has no engine lights and runs fine, sounds great
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