MAF problems?

[DSMatMSU]

whenever i go to WOT throttle my car basicly falls on its ass... the o2 readings fall to zero (new o2 sensor) and my LTFT max out.... apparently running very lean... ive replaced just about everything in the system... im starting to wonder about the MAF tho...
the other problem im having (not sure if its related or not, this problem came about after the above problem) is at low rpms my knock shoots up to 43, consequently pulling my timing drastically (brand new knock sensor)...

anyone know how to check the MAF?? mine is not hacked...

I have a logger... ive tried two sets of 450 injectors (same results) i have a walbro 190 rewired (i may pull it, see if its clogged or anything)... i guess one other thing worth checking out is the FPR... also tried another ECU and CAS

thanks for any help
(mods in profile)

 

[Stingray90]

Does your car drive fine while cruising/part throttle?
How much boost are you running ( on aftermarket boost gauge) using those 450cc injectors? If you have an S-AFC I'd check to see if the settings didnt somehow get all screwed up and check the TPS while you're at it.
U still running the stock MAS, 2G MAS, 1G MAS hacked, etc...? Also, Im sure someone will ask if you've checked for boost leaks and engine codes. Good luck