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Throwing Code P0305 Misfire Cylinder5

28K views 20 replies 13 participants last post by  Gino Puma 
#1 ·
I have a 2014 3.6L Automatic We have swapped out coil and eliminated that as the issue. Put 6 brand new Bosch injectors and this only temporarily fixed the issue. Now it is misfiring again not even a day later. There is no shaking or rough idling. It seems to be only at start up them seems to disappear. Any ideas what this could be? I haven't driven it since I don't want to cause a bigger issue not knowing why it is doing this. Thanks so much for your help!
 
#6 ·
Yes we replaced all spark plugs and actually cylinder 5 plug did not look that bad, a little darker then others but not terrible. Cylinder 5 is on Drivers Side of Motor closest to the fire wall just to confirm right? Saw a few diagrams tonight that showed different.
 
#9 ·
Per the MOPAR service manual:

The cylinders are numbered from front to rear. The right bank is numbered 1, 3, 5 and the left bank is numbered 2, 4, 6.

So cylinder 5 is right (passenger) rearmost cylinder.
 
#10 ·
I have a P0306 on my Jeep and hooked up a OBD2 tool to graph RPM on my iphone. I then sprayed carb/chock cleaner where the head and it intake manifold meet and found that my RPMs varied when I sprayed near #6. I have a new mopar gasket and am getting ready to tackle the job. I had to be underneath the jeep to spray on the underside of the intake manifold. It is a test that only runs about $3.


Un, wrong forum... this was on my TJ... ha ha... I don't think the 3.6 will have the same issue as the 4.0L.
 
#15 ·
Welcome to the Forum, from Cave Creek AZ.
 
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