RPM surge? 2003 H2 - Hummer Forums by Elcova

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RPM surge? 2003 H2

#10

01-18-2014, 09:03 PM

MrIgor

Hummer Veteran

Join Date: Mar 2011

Posts: 43

Re: RPM surge? 2003 H2

Update: i checked all wires going to transmission. All perfect.

Interesting thing: I put it 92 octane gas into the truck, and it runs almost perfect. the timing will get changed to higher octane gas. Now question is now what??

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