90 2600i just died after starting fine help!
 

I have a 90 2600i that just died after starting fine and now it will try to start and run with a little feathering of the throttle but then it dies again. This is the first problem I've had with this truck and I hope someone can point me in the right direction in trouble shooting it. It has spark and is getting fuel to and from the filter on the firewall and I did change the plugs but that is all I did to it till I hear something from this forum. Any help will be great as it is my work truck...thanks in advance.