I have a 94 pickup with 22re that has loss of power under load. Any suggestions on what to do next would be great. I have installed a new fuel filter, mass air flow, plugs (not wires and distributor) and a throttle position sensor.

 

If you have a vacuum gauge on hand, hook it up to manifold vacuum and do the following tests: This checks for plugged cat, muffler, bent exhaust pipe.

 

Yes! Vacuum gauge diagnostics used to be much more common in the 70’s and 80’s. Still valid today!