C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Stumbling on throttle tip in

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Old May 1, 2008 | 11:56 AM
  #1  
lddavis91's Avatar
lddavis91
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From: Belleair Bluffs, FL
Default Stumbling on throttle tip in

So, I just last night picked up a '92 LT1. It has a minor problem with a little stumble then serge sometimes went tipping into the throttle. Seems to happen mostly only under 2000 rpm. It has the DRM "Top End" package installed with the bigger throttle body and ecu tune. Could the problem be related to that? Any other ideas? TPS?
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Old May 1, 2008 | 12:11 PM
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OK, next time I must remember to search then post, rather than post then search. I guess I should start with a basic tune up, and then revisit.
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Old May 1, 2008 | 03:01 PM
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Basic tune up a good start, check for vacume leaks.

Is it a custom tune, if so, try datalogg then send back for retune. just something to get you started
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Old May 1, 2008 | 04:31 PM
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Could be lots of things but a problem in the tune itself can absolutely cause that
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Old May 2, 2008 | 11:18 AM
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Originally Posted by RUKWKR
Could be lots of things but a problem in the tune itself can absolutely cause that

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Old May 2, 2008 | 11:28 AM
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I don't know much about the DRM package but I would assume it has a good size cam? Any chance you have the specs on the cam?

Reason I ask is if it has a "big" cam it's all the more likely this is a tune problem - I'm still working on the tune on my 96' and I have the same problem because I have a pretty nasty cam in it.
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