Misfire issue

[Twilight sentra tuner]

well here's the scoop. the car threw a P0300 random/ multiple misfire code. however the car isn't throwing a code for anything that could cause a random misfire.

its not spark plugs, coilpacks, fuel injectors, fuel rail, FPR. its missing at idle and when accelerated, it stays at 2,000 to 2,500 rpms for second then rises through the range. the possibilities that i can think of are IACV, EVAP, TPS, EGR, PCV, MAF.

u guys have helped me alot. help me out on this. i've got an FSM on the vehicle and its still hard to figure out what it is.

[RED_DET]

MAF

[Twilight sentra tuner]

how sure r u on that? the other possibilites can cause this to happen. i just don't want to waste my money. what's the proper voltage that the MAF uses? i think it's between 1.3 and 1.7. but i wanna be sure.

[Twilight sentra tuner]

update....... i performed a test on the car by disconnecting the MAF and starting it up. she purres like a kitten. my question is, what MAF from a different vehicle would work in conjuction with the computer? like a G20 MAF for example.