99 5.7 vortec
I have a 99 gmc c2500 with a 5.7 vortec. I pulled
the motor and dropped 4000$ into parts. Corvette
crank cam pistons and heads. Got it running great
till last week when I cold start and try and take off
it starts to sputter real bad for a couple seconds
then launchs, the second issue when I'm giving it
gas and let off at my cruising speed it pops and
back fires every time I left off the gas. Any ideas
what it could be? My MAS just went out ordered a
new one. Do you think this is related to my MAS?