Why does my 95 astro starts but runs rough then smooth ? on 1995 Chevrolet Astro

it stalls out when put in gear and gas is appled

3 answers
have compression check done...
that could be alot of things seek diag and est
I had a similar problem that got worse and worse to finally it would not start. It would start if you poured gas on the air filter. I had tried everything. Pump, filter, sensors etc. It was the control module (on board computer)