Popping noise under hard acceleration @ any RPM

[Naf]

I just got my truck tuned and running great. WOT is 12.4 and it idles. my trim at idle is +/- 1 and when i am cruising my trim is also +/-1. but when i mash the pedal i get hesitation and a popping noise. My trim jumps to +5.5 the truck kinda stalls and when it catches itself it goes. Also when its shifting under hard acceleration i get a poppin noise.

Anyone know how i can rectify this?

I am runnin a 100mm Maf so i have the truck in SD mode till about 3000rpm for enough airflow to register. I increased the MAF in the troubled areas, but it doesnt seem to help...

[joecar]

By popping noise do you mean spark knock...?

[Naf]

no, its like a backfire. I am not gettin any knock, just hesitation and loss of power

[darcy]

Maybe take a look at B0167 - this, combined with B0168 will result in a 1 sec delay before PE fuelling.
Also you B0169 appears with blue dog-ears, indicating it's out of range.

[Naf]

i lowered b0169 as well as b0167, i will try it on my way home from work...

Thank you

[Naf]

Ya, that didnt help. I increased the MAF calibration so it is in Ratio with the original. That may just be the problem, because of the sudden change in the TB the ECM is referring to the MAF and gettin a lean mixture causing my poppin noise...

Now i have to sit and retune my cranking air till i get it to start up the same way