jeep hesitation during acceleration - JeepForum.com

 
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post #1 of 5 Old 12-19-2012, 05:52 PM Thread Starter
youpat2
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1998 WJ 
 
Join Date: Dec 2012
Location: claxton
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jeep hesitation during acceleration

the vehicle is a 98 jeep grand cherokee laredo 6cyl 4.o.
ive have replaced pcm(2months old), tps,crankshaft sensor spark plug wires distubutor cap and coil. most parts were replace to try and correct a stalling issue which was fixed by the new pcm. fuel pressure was checked 2months ago by dealership and mechanic shop. current cel is p0318 (downstream o2 sensor) any ideals to what could cause the hesitation?

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post #2 of 5 Old 12-19-2012, 10:44 PM
jokerchief462
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1989 YJ Wrangler 
 
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Location: Sin City
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Start with fixing the downstream O2 sensor. Since it feeds info on the burn to the computer which then uses the two O2 sensor readings to adjust your mixture that would go a long way to getting mixture correct and should help the acceleration problem.

89YJ 2.5L TBI, AX-5, NP231 SYE, Ford 8.8, Yukon Grizzly, Tom Woods Shaft, 33" BFG T/As, 4" lift, Warn VR10000s.

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post #3 of 5 Old 01-03-2013, 04:43 PM Thread Starter
youpat2
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Join Date: Dec 2012
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i took it to a mechanic and he said it feels like the torque converter. but wouldn't a bad tc throw a cel .
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post #4 of 5 Old 02-23-2013, 07:03 AM
Speedymcracer01
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Quote:
Originally Posted by youpat2 View Post
the vehicle is a 98 jeep grand cherokee laredo 6cyl 4.o.
ive have replaced pcm(2months old), tps,crankshaft sensor spark plug wires distubutor cap and coil. moist parts were replace to try and correct a stalling issue which was fixed by the new pcm. fuel pressure was checked 2months ago by dealership and mechanic shop. current cel is p0318 (downstream o2 sensor) any ideals to what could cause the hesitation?
I have the same model jeep mine would hesitate sometimes and other times my transmission would kick and lose drive,and i mean kick hard.one night it died i had a complete system failure including the pcm i tried everything from tracing wires to testing the computer it kept blowing the fuse to the pcm. After three days i got a clue to what the problem was. my 02
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post #5 of 5 Old 02-23-2013, 07:13 AM
Speedymcracer01
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Quote:
Originally Posted by youpat2 View Post
the vehicle is a 98 jeep grand cherokee laredo 6cyl 4.o.
ive have replaced pcm(2months old), tps,crankshaft sensor spark plug wires distubutor cap and coil. most parts were replace to try and correct a stalling issue which was fixed by the new pcm. fuel pressure was checked 2months ago by dealership and mechanic shop. current cel is p0318 (downstream o2 sensor) any ideals to what could cause the hesitation?
My o2 sensor wire was pulled down alittle bit by a branch from a down tree it had been rubbed down to wires,and had been arching on the drive shaft causing a shortage to the pcm that caused all my malfunctions until it was worn down and rapped around the drive shaft and thats when it died.I found the problem then i taped the wires up good and made sure it was secured behind the heat shield havnt had a problem with it sense
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