Long story short my 92 305 stalled one night took it ti a shop it lost spark replace distributor and coil pack and it ran good so I drive and when I give accelerate highway speeds it back fires and stalls always restarts I drove a week cool but once you step on it gives a pop sound n and stall been to the shop 3 xs plugs wires are good voil pack distrub good timing food no codes adjusted the rich n lean im thinking fuel filter and maybe pump why does it run good at normal speeds but choke out high help plz

 

Any codes?

I'd find TDC #1 cylinder on compression stroke, then pop distributor cap off and verify rotor pointing to #1 spark plug wire and verify firing order on the cap.

 

sounds like a bad ecm and or prom,but it does still sound ignition related. Is your distributor in correctly? Maybe a tooth off. Like the other member said. Check for codes again even if your engine light is not on.

 

Welcome Aboard!

Has anyone checked the valve timing?