i have a 2.8 v6 pontiac motor i have to hold it wide open for it to start if u let...

...the gas go it dies?
ok what i done is put a head gasket on the motor .it ran before i did when i got it back together it wouldnt start so i checked the plugwires and they was right.i can hold the throttle body all the way open and it will crank but if i dont keep the gas going it dies and have to hold it open again to start
 
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