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Old 06-28-2016, 04:24 PM
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Please help!!!!

I have a 2000 Jeep Grand Cherokee Laredo. I have a multiple misfire problem, and it only goes to about 2500rpm and starts bucking. I also have been losing power going up hills, it creeps at 15-20mph. I have changed coil packs, head, spark plugs, computer, wires, tps sensor, camshaft sensor, cat converter is off, upstream 02sensors are disconnected. What else can this be????

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Old 07-04-2016, 06:21 PM
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Re: Please help!!!!

Did you check the fuel pressure already? A too low pressure will reduce the amount of injected fuel. This can go that low that the mixture will not ignite anymore.
Did you disconnect the upper O2 sensors (1-1 and 2-1) to trouble shoot this problem?
A plugged exhaust will also reduce the power.
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