dun4sho
September 11th, 2011, 04:46 PM
i have a 2007 chevy classic duramax LBZ with exhaust/program/race valve/fuel pump/tranny/cold air. when i am crusing about 50mph-up and decide to give it just a little pedal to speed up my truck surges like a missing or cut out,like a stopped up fuel filter,but i tried changing it and no change? will not act up when i mash down on it. fuel mileage is terrible also. motor runs good,no rough idle or anything just the missing problem like i mention. can anyone help?? oh i put royal purple ATF in tank about every 8-fill ups.