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Cylinder 3 misfire won’t leave me alone. Help


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Hello everyone.   This is a great forum with lots of great info.    Figured I’d give it a shot.  2.4L  has cel for cylinder 3 misfire.   I have been reading bout this issue so here goes

 

2015 Dodge Journey crossroad 2.4L

past 2 weeks

 

all new coil packs and spark plugs changed out twice

 

1st. set was Champion plugs/carquest premium coils.  Pre-gapped but double checked

 

2nd. set was ngk plus/ngk coils.  Pre-gapped but still double check

 

reset engine light both times.  Would drive good for a day then after a sit, when we start it there’s a rough idle for about 15-30 seconds then car drives fine but has cel for cylinder 3.

 

3rd.  Compression test great.   Replaced all fuel injectors and rail.  Checked wiring and grounds.  Also went ahead and had valve cover gasket replaced.  Drove great for about 2 days.  Come outside to start her up and boom there goes the rough idle once again followed by cel

 

4th.  Replaced manifold gasket and pvc valve.  Drove good for about a day.  Then issue right back

 

Today.  Vacuum leak test.   No leaks detected.   
 

Car history.   1 owner car, 156k miles superior on the maintenance. Never ran hot.

 

any ideas out there??
 

 

Edited by DaisyDukes
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Wow sounds frustrating. You have covered pretty much all the bases. A node light clips on the injector wire harness and flashes to show a good strong constant signal to the injector. 
When engine is acting up it needs to be used on your wire harness. If it shows an issue in your case It would probably indicate an ecm computer problem. Not a common failure item and not cheap to replace. Remanufactured  units are available.

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IMG_20240522_063952.thumb.jpg.62c62ae69d0e643860b5c4bae05f3e8e.jpg

 

One thing, that is a problem on the Journey. There isn't enough engine to chassis ground straps or cables. 

 

The main engine battery ground is a small 4 gauge.

Should go to a 2 gauge.

Add a 4 gauge ground on the

opposite engine mount.

2 gauge if it will fit in.

 

Dean

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