1992 B2200

It seems to hesitate or lose power worse when it has warmed up. When driving 55 down the hwy it will start hesitating and lose power. If I floor it the truck will power up fine. It may clear up after flooring it or it may continue to hesitate. I replaced the fuel filter, verified the timing, cap and rotor appear good as well as the plugs and spark plugs.
Also the it idles fast when its warmed up 1000

What would you suggest next? Carb?

thanks

 

Fuel pump failing perhaps?

 

I'm not sure about what other things could cause this in the b2200 but it's common for a bad egr to cause the car to run fine cold then start to miss. Sometimes it can get better by taking it out and cleaning it but usually it needs to be replaced, if it gets worse to where it will actually shut off after getting to full running temperature then it's likely a bad egr valve.