Need some help here,I have a 2000 Tahoe 5.3 165000 miles has developed a light miss or surge 40 mph or above.Has new plugs, wires , new intake seals,has latest flash for these complaints.Fuel economy has dropped from 21 on highway to about 14mpg.Runs good under hard throttle and idle.Scanner shows no missfires and has no stored or active codes!Any help would be greatly appreciated.
Sick tahoe
- Thread starter MARKT
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