Hummer Forums by Elcova - odd semi-surge

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orlasttoy

12-28-2011 08:51 PM

odd semi-surge

Hey all...

I'm getting a slight "surge" when cruising along around 55 MPH. It bounces up & down between 1500-1700 RPM with my foot lightly on the gas.

Weird thing is she idles perfectly fine.

I'm thinkin it's because I upped the tires to 37s? Am I on the right track or are there other theories?

Thanks!

guruerror

12-28-2011 11:23 PM

Re: odd semi-surge

Did you re-tune after you went up to 37s?

etmyers

12-29-2011 04:01 AM

Re: odd semi-surge

I have the same thing, do a search. Lots of posts on here about it and remedies to fix

HUMTECH

12-29-2011 06:43 AM

Re: odd semi-surge

sounds like tcc going in and out of lockout to me

charles06

12-30-2011 03:34 PM

Re: odd semi-surge

I've been having the same issue between 45 and 50 mph. Please post what you find.

orlasttoy

12-30-2011 11:30 PM

Re: odd semi-surge

Quote:

Originally Posted by guruerror

Did you re-tune after you went up to 37s?

no :(

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