My first post on here, hoping for some help and some answers. I have a 91 Bronco, Eddie Bower, 351W. I've been having issues with a rough idle, stalling, and speed. I've replaced many parts, and gotten rid of a few issues.

Trucks runs decent until about 30-35MPH. It doesn't seem to want to go any faster. Once it hits speed, i have no power in the gas petal. Engine doesn't die, or Rev up. It feels like it's idling at 30MPH with my foot to the floor.

Been told it could be transmission issues, or computer issues?
New parts: Idle air control, throttle position sensor, MAP sensor, Fuel filter, pump and rails, EGR, plugs, wires, cap and rotor, O2 sensor.

Any help is appreciated.

 

Plugged catalytic converter???

 

Check the fuel pressure to confirm fuel pump needs to be replaced.

 

Money thrown at problem... time thrown at problem... have self-diagnostics tests even been attempted? No mention of the results of any self-diagnostics tests are apparent here. Believe it or not they do work and will point out problems. Without these results, we are guessing just like you are.