Question about 1989 Jeep Cherokee

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Losing speed going up a hill.

I have 1989 Jeep Cherokee. The more I accelerate, the more I lose speed going up a hill. I have no problem on a flat surface. Why?

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Sounds like you need either a new fuel filter or a complete tune up. Get at least 3 quotes from Auto mechanics and choose the one you want. YOU are the customer.
Good Luck

Posted on Sep 13, 2009

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Check timing, check plugs, wires ,cap, and rotor

Posted on Sep 13, 2009

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Losing speed when going up hills


catalytic converter. get it tested. Might be the fuel filter clogging up.

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If fuel filter isn't on the frame near the l/r wheel it's on top of the fuel sending unit on the tank.

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Running out of power going up a hill is generally the fuel pump. Now days a plugged catalytic converter will do it also. The fuel evaporation test could be a bad gas cap or evaporation canister or hose somewhere. The exhaust manifold is a jeep thing, expansion and contraction, hot cold over and over. Have it welded or replaced.

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Losing power when I accelorate.


Fuel filter is the main culprit when you lose power going uphill. Going level or downhill means that the engine doesn't have to work all that hard and doesn't demand much fuel, so a partially clogged filter can usually flow enough to allow the car to run smoothly. Going uphill requires signficantly more fuel, and if the filter is clogged up, it won't be able to flow enough fuel. This will bog the car down and cause you to lose speed. Change your fuel filter.

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