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93 xj rpm problem

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Old 08-26-2013, 05:48 PM
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Default 93 xj rpm problem
93 cherokee 4.0 ho when i accelerate fast or
Floor it it breaks up real bad and also idles
Alittle rough need some advice thanks
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Old 08-26-2013, 06:36 PM
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Originally Posted by ron79
93 cherokee 4.0 ho when i accelerate fast or
Floor it it breaks up real bad and also idles
Alittle rough need some advice thanks
Breaks up real bad? My advice, more/better info.

But my guess? Cat, fuel, or hmmm do you have any codes??
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Old 08-26-2013, 06:56 PM
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T When it breaks up it will pop out of exhaust and miss
Bad untill you let out of pedal some
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Old 08-26-2013, 06:59 PM
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Is this happening around 3000 rpm? Is it bucking like you are hitting a limiter?
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Old 08-26-2013, 07:34 PM
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Originally Posted by ron79
T When it breaks up it will pop out of exhaust and miss
Bad untill you let out of pedal some
What have you tried as far as diagnostics, any maintenance?
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Old 08-26-2013, 07:48 PM
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Just got this saturday looks like new plugs wires and
Cap guy said he just put a used ecm in it from junkyard
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