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Hello I am experiencing a weird bucking under acceleration it is a bone stock engine all emissions intact. If you bring up rpms while in park it will climb to 1250 and rpms will begin to drop out intermittently by 300-350 rpms if you drive the truck it will shake the truck and buck but not die when it occurs, If you powerbrake the truck in the shop bay it usually will kill the engine immediately when it occurs. There are absolutely no codes using an IDS and Snap on Verus scan tool, have done all basic tests I could think of wandering if anyone out here has had an issue like this?
 

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Sounds like the issue we are having with our 2011. Engine will stop after starting at idle, had the same bucking at speed, I think the engine is stopping but still turning over due to the trans lock, then re-starts by itself. No codes either.

It's very intermittent, truck will run fine for weeks or months then does it again.
 
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