1994 CHEVY 1500 5.7LStarts/runs 2 to 10 sec./dies.not consistent.
When not dying,runs rough cold/hot,no mechanical issues.
No vac leaks,timing set from 0 to 8 degrees.
Replaced dist,ign mod 2 times,thermostat 195,map sensor 2 times,cleaned IAC valve,
tested IAC circuit,replaced ign coil,runs better with vac off map sensor
EGR valve pluged.battery drains overnight.
After entering above info, drove truck to teck shop for advice.stoped engine
after 45 sec, idle/run normal.During next drive codes 35/44 were set.
Will replace IAC next.