1998 4 wheel blazer runs fine except when on hills, no check engine light or anything comes on. i have replaced the fuel filter, fuel pump, and tps. Anyone have any ideas before i spend more money chasing down this problem? thanks

1998 4 wheel blazer runs fine except when on hills, no check engine light or anything comes on. i have replaced the fuel filter, fuel pump, and tps. Anyone have any ideas before i spend more money chasing down this problem? thanks


How is the basic tune up end?
Good AC - Delco plugs?
Any cold air intake stuff or cone filters?
Have you tested the fuel pressure?
What is the engine vacuum reading at idle and at 2K rpm?
Do you ever see the checking light flash?
Can you feel a miss fire on a hill?
Why was fuel pump and tps replaced?
Ac Delco fuel pump?

The fuel pump was really loud, not just normal wine/hum sound, and also was suspected of the power loss on hills. then when that didn't work a mechanic guessed at the tps. Fuel pressure is good. no light ever comes on, and i am always keeping an eye out for it. no miss fire just wont accellerate on hills, you push the petal and then nothing push a little more then a short burst of acceleration and back to 1300-1500rpm and repeats

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You need to give us some info we can sink our teeth in.
Before we can help you?
Ac Delco plugs?
Ac delco fuel pump?
When was the last tune up?
What kind of air filter system?
What is the engine vacuum readings?
What is the good fuel pressure readings?
Have you tested the fuel pressure on the hills?