1989 Jimmy 4x4 4.3L won't start

[manofmoon]

Hello All,

I am A newbie here. I am having problems with my Jimmy, It won't start.

It has spark replaced the cap and rotor about 6 mo. ago. Ran great until about 2 weeks ago, it just died as I was warming up to go to work. I have since replace the fuel pump, fuel filter (got good pressure at the inlet carb side). But the TBI doesn't give gas. If I give the carb a little gas from a can it fires up until the gas

is used up. Last week I fianlly found a ECM that macthed the model numbers but still the same thing!

I must have missed some sensor that disables the open signal to the TBI.

Does anyone know of the sonsors that can disable th TBI? How can I check if the TBI is getting signal? HELP!