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07-28-2018, 08:58 AM | #1 |
Carpe manana
Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,410
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1999 Vortec 135k mi hesitates at hwy speeds...
Anyone deal with a similar issue? The vortec 350 in my 99 Suburban hesitates/stutters briefly when under hard acceleration at highway speeds and when accelerating uphill but otherwise runs great. The motor was professionally tuned about 15k miles ago. Fuel filter recently changed. No check engine light.
Thanks, Pete
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