Compression Ignition Addict
Join Date: Feb 2010
Location: Farmersville/Dayton, Ohio
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^^ No, because these motors don't have throttle bodies. They have a fly-by-wire throttle system since they are direct injected.
My truck does the same thing. If its already warmed up when it starts it runs nice and smooth for a couple seconds, then it starts to roughen up. Does the tach move any at idle? Mine seems to move up and down just a tad bit, but its barely noticeable.
My problems are caused by worn out injectors, which i am working on replacing. If you have any friends that have a good scan tool, try to do a buzz test and cylinder contribution test. Thats how the dealer determined i had 2 weak injectors, even though we already knew that.
97 F-250 ECLB 7.3/E4OD/4wd, 216k miles: FFD 250/200%'s, stock turbo, built trans, e-fuel, Swamps IDM, shimmed 910's, Melling LPOP, welded cam gear/modified pick-up tube. Built and tuned by me
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97 F-250 ECSB project truck:250/2's, Gen 3, S468, SD axles, studs/springs, ZF-6