1991 suburban starting problem
 

well i have a 91 suburban just put in a 93 tbi 350 and 4l60e. the problem is it starts and then stops if i hold the gas in a little bit it will stay running if i let off it dies. any help would be great I also put in wiring and fuel pump out of 93 that did run perfect

If it is fuel injected, check your idle air control valve. If it doesn't open, it can't idle.

If it is carbureted, check there.

will have to have a look every thing worked fine in the other burban i pulled motor and tranny as one unit and all wiring

put in new fuel pump and filter still no luck i about done anybody want to buy a 91 4x4 with 93 motor and tranny

is the timing right?