having a little problem need help

i just recently put in a 75 mm mass air with 24 pound injectors on my 5.0 and since than ive had a problem with it studdaring and it pings a lil but not all the time, it will run great for a while and run like **** out of no where, i have alot of crankcase pressure could this be my problem or should i keep looing

i also have cobra upper and lower a crane came and 70mm throttle body for more air can someone help me?

check your tps reading it should be .94-.99 volts or something like that,also you didn't mention having a adjustable fuel pressure regulator maybe your fuel pressure might be wrong.It should be about 40 psi.

ok thanx ill check the tps and i have a stock fuel regulator also i called a performance shop and they said it could have something to do with my pcv valve cud this be possible

Did you recalibrate your computer? Just a thought.