Yep - when at stock setting - no codes.....when programmer is installed on level 2 - i get the codes....Im at a loss. The shop that has the truck right now is also at a loss. They are stumped. When running in level 2 - driving around 50 -60 mph (1500 - 2000 rpm) the truck surges and misses and I get the DTC's - CEL never comes on - well it does if I continue running it like that - or if in park or neutral - and revving the rpm to 3000 or so and holding it - the truck misses - you can feel it and hear it - when you let off the throttle - the truck idles rough - thats when the codes come up. The shop said it did it all last week just like that - like it had been doing with me for so long - they did all that work and took the truck back to stock and since then no codes - nothing. Hooked it back up and to level 2 today and boom within a matter of minutes - codes were back and truck was missing.......Im confused and very frustrated.
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