Auto Parts: 1989 ford bronco l l 2.9liter v6 4wd auto, throttle position sensor, ford bronco

Question
bronco runs great cold when I run it hot it runs poor up hills runs slow I just put thermostat in it new coolant plugs wires

Answer
Hello Keith,

I understand your problem.  Have you checked the TPS (throttle Position sensor) this sometimes, can get warped especially if the engine has ever overheated.

Also, i recommend checking for a bad vacuum hose, or a missing one, as this will cause your type of problem when the engine gets hot.

Please start there and let me know how you are progressing.

Thank you

Good Luck