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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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Injectors usually won't cause that problem but the injection pump will. The only other thing that comes to mind is a bad exhaust restriction
Dang, I was hoping it was going to be a simple fix.

One thing to try is when it's hot, and your having the problem, try shutting the truck off, and pouring water on the ip to cool it down.

If you start the truck up and it runs better then potentially your IP is bad.

Someone chime in if I'm wrong on this technique.
NOOOO don't do that if you poor cold water on a hot pump you will ruin it.
I just wouldn't take that chance, he doesn't have a start issue like your link points to.
Glad to hear you got it fixed:thumbsup::thumbsup::thumbsup:
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