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How many miles on your fuel filters? I had 26,000 on the original filters (I know shame on me) and my truck would act the same way. It sounded almost as if it were running out of fuel on the top end especially with the SCMT HP tune installed. Just my .02
I changed both fuel filters and the air filter. I turned the truck down to the tow safe setting and it runs fine. Turned it back up again and it studders. Anyone running a stock 6.0 on the SCMT Economy program?? What else should i check? Thanks
mine was doing that today after an oil change and making a very audible hiccup on deceleration, I checked under the hood and they left part of the airbox unlatched, I latched it and drove 1/2 mile, it studdered bad one time then straightened out and has run fine, I ran it back by Good Year and they ran it on the computer and there were no codes, the manager is a friend of mine
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