1991 2wd pickup 22re , blew head gasket, replaced head gasket. The truck will idle fine and run 70mph fine until you get it in the least bit of strain. It then acts like it is not getting fuel. Have changed plugs, wires, rotary button, distributor cap, and fuel injectors. Still does the same thing. Help Please!

 

Fuel pump could be dying, can't keep up with "putting the least bit of strain" on it.

Although I'm not entirely sure what you mean by "The truck will idle fine and run 70mph fine". So it drives properly up to 70mph, but bogs down going up hills or towing or something? I'm confused

 

Yes, it runs pretty normal until it gets in the least bit of a strain.

 

You Need to be more descriptive.

I hear see smell and feel ... When I ...