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Jeep Wrangler JK
JK General Discussion
3.6 Pentastar Misfire on Cylinders 1, 3, & 5
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<blockquote data-quote="Sketchmo" data-source="post: 447201" data-attributes="member: 23279"><p>M Duncan,</p><p></p><p> I just read your initial post and I am having the same exact issues with my Dodge Durango 3.6 on cylinders 1,3 mostly and sometimes #5. I too want to keep my 2011 Durango that currently has 245K miles that I have owned since new. The vehicle has been taken very good care of so I want to keep her. I new keep getting the CEL with the #3 and sometimes #1 and random #5 misses. The misses on these individual cylinders are never at the same time. The engine misses mostly at idle or while driving not under load. The left side cylinder head was replaced under the recall so luckily no issues with 2, 4 or 6 cylinders.</p><p></p><p> I have also changed coils, plugs, rocker arms, lifters, PCV, Injectors, (used) throttle body, upper and lower intake gaskets, O2 sensors. I have a BlueDriver scanner that can read the data from the PCM. I will live graph the O2 levels like Xactly had suggested to see if it's a O2 sensor issue. </p><p>My thoughts were headed towards an electrical short or a vacuum leak. I went ahead and changed all the intake gaskets to no avail. I just got an electrical diagram so I will start that soon. </p><p></p><p> If of this doesn't work I am waiting on an AESwave UScope to verify what might be causing the miss but delivery is 2 months out. I am just learning how to use an oscilloscope but was thinking about a bi-directional scan tool. Thoughts were picking up a TopDon tool and I was hoping that it might help.</p><p> </p><p> Since I retired I have plenty of time to play with this but after messing with the vehicle for 5 months it's getting old. Please let me know if you have found the cure for your Jeep!</p><p></p><p>Thanks</p><p>Sketchmo</p></blockquote><p></p>
[QUOTE="Sketchmo, post: 447201, member: 23279"] M Duncan, I just read your initial post and I am having the same exact issues with my Dodge Durango 3.6 on cylinders 1,3 mostly and sometimes #5. I too want to keep my 2011 Durango that currently has 245K miles that I have owned since new. The vehicle has been taken very good care of so I want to keep her. I new keep getting the CEL with the #3 and sometimes #1 and random #5 misses. The misses on these individual cylinders are never at the same time. The engine misses mostly at idle or while driving not under load. The left side cylinder head was replaced under the recall so luckily no issues with 2, 4 or 6 cylinders. I have also changed coils, plugs, rocker arms, lifters, PCV, Injectors, (used) throttle body, upper and lower intake gaskets, O2 sensors. I have a BlueDriver scanner that can read the data from the PCM. I will live graph the O2 levels like Xactly had suggested to see if it's a O2 sensor issue. My thoughts were headed towards an electrical short or a vacuum leak. I went ahead and changed all the intake gaskets to no avail. I just got an electrical diagram so I will start that soon. If of this doesn't work I am waiting on an AESwave UScope to verify what might be causing the miss but delivery is 2 months out. I am just learning how to use an oscilloscope but was thinking about a bi-directional scan tool. Thoughts were picking up a TopDon tool and I was hoping that it might help. Since I retired I have plenty of time to play with this but after messing with the vehicle for 5 months it's getting old. Please let me know if you have found the cure for your Jeep! Thanks Sketchmo [/QUOTE]
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Jeep Wrangler JK
JK General Discussion
3.6 Pentastar Misfire on Cylinders 1, 3, & 5
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