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Unread 05-07-2014, 05:44 PM   #1
Gervin
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1980 CJ7 
 
Join Date: Jul 2011
Location: Union, Ky
Posts: 12
95 Jeep yj missing help!

I have a 95 jeep yj 2.5 with a miss that I can't figure out! It only does it after it's warmed up and it's in closed loop. I've replaced a the 02 sensor and the Coolant temperature sensor and it still misses. It only happens under light throttle about 2000 rpms or a little above. It's not a steady miss but random maybe one cylinder then two or three untill you ease on the gas and it stops missing completely. I unplugged the vss and it ran great because it stays in open loop. Any help is appreciated!

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Unread 05-14-2014, 07:33 PM   #2
laybackman
Bikini Bridge Inspector
 
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1995 YJ Wrangler 
 
Join Date: Dec 2002
Location: Massachusetts
Posts: 6,167
Quote:
Originally Posted by Gervin View Post
I have a 95 jeep yj 2.5 with a miss that I can't figure out! It only does it after it's warmed up and it's in closed loop. I've replaced a the 02 sensor and the Coolant temperature sensor and it still misses. It only happens under light throttle about 2000 rpms or a little above. It's not a steady miss but random maybe one cylinder then two or three untill you ease on the gas and it stops missing completely. I unplugged the vss and it ran great because it stays in open loop. Any help is appreciated!
The VSS crank and cam sensor all get their 8 volts from the same circuit. The VSS can begin to fail until it shorts internally. Once it does it will not start anymore. But it begin by giving little signs that get more constant over time until it does fail.
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