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Power surges after 2500 rpm

10642 Views 27 Replies 6 Participants Last post by  1dieselman
Well, I did a search and I can't find anything that is the same as my problem.

What happens is, at 2500 rpm, if I increase the throttle there is less acceleration than there should be, then at maybe about 2600 rpm, the truck will surge up to about 3000 rpm without a change in the throttle.

Seems like it happens only when the truck is warm, and maybe been on the highway for a while, but I also don't rev it that high when cold so I am not 100% sure of that.

I am guessing the IP or lift pump, but IP is the only thing that makes sense to me.

Has anyone experienced the same thing or have any ideas?
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I've noticed similar problems with my truck. My dilemma is that the fuel pick-up on the sending unit are broken on both tanks. When my truck isn't level, or to the point where it begins to suck in air- it surges. Try filling up your tanks and selecting between the two tanks to see if it fixes it. Another problem you suggested could be the lift pump. This is also another problem area. They're not expensive, and once the vacuum pump is removed, very easy to install. Even if it doesn't fix it; you'll still have piece of mind knowing that it's new.
I bet when you fill up the tanks, the problem will go away. Can you use all of your fuel in both tanks? I can only use 10 gallons out of each tank, and I think they're 16 or 18 gallon tanks (my pick-up on the sending unit is broken, on both tanks)
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