94' Wrangler engine problem - JeepForum.com

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post #1 of 5 Old 09-30-2010, 08:18 PM Thread Starter
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2000 XJ Cherokee 
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Location: Pensacola
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94' Wrangler engine problem

My brother just bought a 94' Wrangler with a 2.5L 4 cylinder and it's missing between about 2000 and 3000 RPM. Does anyone have any suggestions? He's replaced the O2 sensor and the crank positioning sensor, checked the plugs and wires and everything else we can think of. Any ideas?

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post #2 of 5 Old 10-01-2010, 06:15 AM
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1994 YJ Wrangler 
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Location: Down South
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Take the TPS and the AIC off of Throttle body and clean them. They are the 2 sensors connected to the throttle body. May also check the Temp Sending Unit at the thermostat housing to make sure it is good. If temp unit is bad it will not allow the ECM to get out of closed loop.
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post #3 of 5 Old 10-01-2010, 12:48 PM
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1995 YJ Wrangler 
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Location: Newport,pa
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I would start with the TPS and AIC like UBAY194 said then i would move onto the fuel system.Could be a "lazy" fuel pump
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post #4 of 5 Old 10-01-2010, 11:30 PM Thread Starter
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Hey guys, thanks, I'll let him know and I'll reply with the results.
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post #5 of 5 Old 10-02-2010, 04:05 AM
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1989 YJ Wrangler 
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I would also do a complete tune up (cap rotor plugs wires) on it as well.

1998 ZJ 5.2 Auto

1989 Wrangler Black Bone Stock 2.5l 5spd
/l , [____],
()_) ()_)==O=)_)
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2.5 liter , engine , missing , wrangler

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