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My 98 Grand Cherokee keeps losing power going up hill, the spedometer would go back and forth even if i am mantaining speed. I could not get it over 40 mph on level road. When i accelorated it sputtered and slowed down.

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Check fuel pressure. Check for restricted exhaust system, Cat converter.

Posted on May 11, 2014

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My 98 Jeep Grand Cherokee loses power going it uphill and when I accelorate it sputters and slows down.


it sounds like you may have a clogged catylic convertor in your exhaust system. after the car has run for a while look at the convertor under the car sometimes they will get red from the heat. or even the exhaust manifold could be red. this just happened to my suv. to confirm that it was my convertors I drilled a 3/8 in hole in the exhaust before the convertors. then I test drove the car going up a steep hill and the car ran fine no more lack of power and the engine ran smooth. if this is not the problem and you drilled a hole in the exhaust pipe then just go to a muffler shop and they will weld the hole closed for a few dollars. good luck

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It could be your transmission trying to find the right gear it will jump around on diffrent road surfaces and going up hills/down hills. It is usaully noticable on cruise because it is at a constant speed and your thinking why would it need to shift. Sometimes it doesnt even really shift the gear its so inbetween it just jumps back really fast.

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