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  #1  
Old 05-26-2012, 05:06 PM
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No power

My Jeep has no power with any amount of throttle, I have changed the tps, map, isc, changed the injectors, the o2 sensors. It does have about 39+-psi of fuel pressure. The computer was rebuilt some time ago.

What else should I check? Also what should long term fuel trim be at?

1998 4.0

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Pat
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Old 05-26-2012, 06:03 PM
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Re: No power

Check the Catalytic converters, they will rob MASSIVE power if plugged up
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Old 05-26-2012, 06:32 PM
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Re: No power

thanks for the info ...i hope not its only about 6mos old....
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Old 05-27-2012, 08:08 PM
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Re: No power

I have seen new aftermarket cats fail very quickly, your long term fuel trim should be closer to 0, + number means its adding that much fuel above the baseline fuel map, a - number means its pulling fuel (so lean and rich respectively). A lean indication could be indication of a misfire which would explain a failed catalytic converter.
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