2006 jeep cherokee 4.7 . When in open loop engine runs fine ,Cylinders1,3,5,7, go dead in close loop.

2006 JEEP GRAND CHEROKEE
85,000 MILES
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CURTIS78
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  • 1 POST
Cylinders 1,3,5,7,go dead when engine goes into close loop . Replaced o2 sensor bank 1 sensor 1. When engine is warm you can unplug overhead coils for 1,3,5,7 and no change .
Apr 16, 2012 at 11:37 PM
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ASEMASTER6371
  • CAR REPAIR CONTRIBUTOR
  • 52,796 POSTS
i would be looking at a possible pcm. before doing this, get a real shop with the ability to diag this correctly.

make sure they do a compression test and check all the basics.


Roy
Apr 16, 2012 at 11:55 PM
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