11 bogging down hesitation stutter

[jomac0321]

I just bought a 2011 Silverado 1500 LT 5.3L z71 it has the 3.42 gears. When ever I try to take off from a low speed/rpm’s the engine hesitates and just feels like it’s being held back til it hits over 2500rpms if I try to turn slow and go up a hill it will bog all the way up the hill unless I put it in Manuel mode and drop a gear to raise my rpms, it almost feels like it’s just in to high of a gear but there is still a hesitation when taking off its like the rpm’s get stuck for a second at a certain spot then it catches another thing idk if it’s related is when I put it in gear and let off the brake it will slowly accelerate on its own. When I bought it it showed code for map sensor replaced that no change, I updated driver side valve cover for new pcv design cause after first time I drove it home when I cranked back next morning  it blew smoke and could smell oil, new cover fixed that though. Everything on live data looks good and no codes except when it hesitates/bogs the spark advance is I’ll drop to between -1 and -6.5. Thought maybe cats stopped up so I removed them with no change. Anyone that can help give insight please let me know 

[swathdiver]

This is either a MAP and or MAF sensor issue.  Did you find an oiled air filter in the airbox?  Check the gap on your spark plugs and make sure all the wires are on properly too.

[jomac0321]

It showed a code for map sensor when I got it, but I replaced it with a new map sensor the next day and it didn’t help and I cleaned the maf sensor, that didn’t help much, a little but not much, and I changed the spark plugs as soon as I got it with ac delco pre gapped plugs all wires are on good, but I got a code once for a miss fire on 8 but it went away as soon as it came and that was before I changed plugs and it hasn’t came back since 

[jomac0321]

And no it was a paper oil filter