1990 f250 5.8 not running right

[Murph2006]

I have a 90 f250 5.8 auto that will try to run but dies. It won't idle at all and to keep it running I have to pat the pedal constantly. When I try to rev the engine it dies. I've got spark, air, and fuel. Fuel pressure is good. Can't find any vacuum leaks. Check engine light doesn't come on at all. I'm pullin my hair out. Thanks.

 

[blacksnapon]

I have a 90 f250 5.8 auto that will try to run but dies. It won't idle at all and to keep it running I have to pat the pedal constantly. When I try to rev the engine it dies. I've got spark, air, and fuel. Fuel pressure is good. Can't find any vacuum leaks. Check engine light doesn't come on at all. I'm pullin my hair out. Thanks.

Timing, and airflow would be a good starting point.