Question about 1999 Jeep Cherokee

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My 99 jeep cherokee loses power going up hills, i've changes so many sensors, i've changed the cadilac convertor

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That sounds like a fuel filter problem its probabily clogged you can buy a new one for 25$ not hard to install on jeeps if the lines are not rusted good luck

Posted on Oct 11, 2010

  • wendy_moore4 Oct 12, 2010

    is there 1 or 2 and where would it be located

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Jeep loses power when stepping on gas


I would check/replace fuel and air filters first-if this does not resolve issues try cleaning fuel injectors also it would not hurt to clean MAP&/or MAF sensors as well

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2008 jeep cherokee hemi engine light its on i brought to fix it and they change 4 sensor and the cadilac converter.


You need to have PCM / ECM - engine computer checked for DTC'S - diagnostic trouble codes an go from there ! there are hundreds of codes these newer vehicles can set ! I hope these people who changed the sensors an catalytic converter checked codes first ! You never ever just replace parts !!!!!!!! A DTC will lead in a diagnostic direction ! Check Engine Code Scanner Advance Auto Parts

Feb 22, 2015 | Jeep Cars & Trucks

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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

May 11, 2014 | Cars & Trucks

1 Answer

1996 jeep grand cherokee 5.2. Sometimes will stall at red light. Turn off ignition and fires right back up. Also, misses when going up a hill. almost as if the power is being shut off. A FEW MISSES AND...


Mine too.same year and make. O2 sensors changed,crank sensor changed,,"No Help. Had to 3 garages and Jeep service NO HELP just a lighter wallet. Bill

Aug 30, 2013 | 1996 Jeep Grand Cherokee

1 Answer

1999 Jeep Grand Cherokee has poor acceleration


try the throttle position sensor as well, wont run you more than forty bucks give it a shot

Sep 10, 2012 | 1997 Jeep Grand Cherokee

1 Answer

'99 Jeep Cherokee. Dies within 10 min of driving


Have you scanned the system for fualt codes? An O2 sensor will never cause the engine to stall out like this, NEVER.

May 10, 2012 | 1999 Jeep Grand Cherokee

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This code keeps coming up we changed the o2 sensor and put new plugs and wires on. The truck is hesitating and seems to lose power going up hills and is now smoking. It is a 2004 chevy avalanche.


This could be due to the wrong O2 sensor, Bad Catalytic Convertor, EGR valve or something along those lines. Did you replace this with an OEM part and not have to change the wiring harness or did you have to change the wirings? The other most common issue is you changed it with a non-OEM product and the O2 sensor is not reading correctly. Check to make sure wires are hooked up correctly. Also not know the details of this vehicle it can be that you changed the wrong O2 sensor also, most vehicles have an O2 sensor before and after the Catalytic Convertor

May 19, 2011 | Chevrolet Chevy Cars & Trucks

1 Answer

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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