YJ+code 51

raleighjeepguy

New Member
Joined
May 27, 2007
Location
Raleigh,nc
So I went down to the beach for a week and was driving on the beach about 20+miles a day. Took a few "tours" which involved some water holes on the access roads and now I'm popping a code 51. Says its o2 lean. Washed out everything and rehooked all my sensors hoping I just jogged something loose but no go. Thing sputters hard and sounds a lil whiney. Most of the time its on mid acceleration or coming off a stop especially when shifting. Any ideas? Swapped out my o2 sensor with my neighbors and still the same prob. Any suggestions?


adder. When it starts up it revs to about 1200-1500rpm and when the check engine light kicks on it drops to norm revs
 
possibly the intake manifold gasket.
 
mine did the same thing, intake manifold gasket was gone. Then I fixed it, just happened again. started using 93 octane and the sensor cleared up and stopped all of the jumping around. seems to run well now.
 
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