88 bronco 2.9 hesitates under load?

[waywoos]

my bronco hesitates under load when i climb a hill and accelerate to about half throttle.its 2.9 with 5 speed manual.
why is this
please help
thanks

[97chevyman]

When is the last time you changed the fuel filter? Take the fuel pressure test, see what you have. Otherwise check for vacume leaks, might be a bad MAP sensor.

[thunderbird muscle]

My quess is to check the fuel filter.