350 is a 350 right???

i have a 1989 chevy suburban with a 350 and a i bought a 1992 lt1 350...now i put my intake on it and tbi...used the firing order from origanal...now all the motor seems to do is blow the gas back out the intake...i am confused?? anybody have a clue why...thanks

ok i figured it out now...i didn't line the distrubtor up right....any who i am dumb today....yeah