Running rough

Asked by May 12, 2018 at 02:00 AM about the 2007 Chevrolet Avalanche LTZ 4WD

Question type: Maintenance & Repair

While driving, noticed lack of power followed by,
what seems to be too much fuel. Idles rough, but
not like a miss fire. Doesnt stall, starts fine but
idles high. I regularly run injector cleaner &
seafoam before every oil change. AFM has been
deleted along with VATS.  I've cleaned MAF sensor,
replaced throttle body and cleaned intake, and plan
to check\change plugs tmrw.  
Possible suggestions: plugged cat, stuck injector,
bad coil, bad plugs.   NO CHECK ENGINE LIGHT!

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