Cylinder 7 deactivation issue. - Hemi Truck Club
 
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Old 10-10-2016, 11:43 AM   #1
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Cylinder 7 deactivation issue.

Hi all, It been awhile since I have posted but once again I have an issue. During the hurricane/storm here in Virginia I had to go out and rescue some friends. Once I got about a mile and half away from where i had to be the road was flooded out. I knew better but went on anyway and the water got too deep to stop or back out but I pushed threw and of course started getting all the warning lights. However I completed my mission and returned home but hurt my Durango in the process. I limped home and just put it into the garage. Later on broke out my scan tool and started to check some things. I keep getting a p1417 cylinder 7 misfire/deactivation code. The engine still has a pretty smooth at idle but shacks like crazy once you try and drive it even if you go into the tow mode to cut out the MDS. Today I cleared the codes, disconnected the battery, and did the hard PCM re-set. Seems little better but still have a miss and shake. Engine never stalled during the drive so I don't think water into the cylinder was a issue, all fluids are still the right colors. I changed this engine out about 2 years ago after my daughters killed it and really don't want to relive that again. i'm thinking this is more electrical than mechanical so any help would be welcome....

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Old 10-10-2016, 01:54 PM   #2
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My first guess is you got water in one of your electric connectors, but since its point at one cylinder I'd start by doing a compression check. You might even find water down around the spark plug boots.
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Old 10-11-2016, 05:33 AM   #3
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Yes check for water intrusion first on cylinder 7. Then move the coil and while there do a compression check to make sure cylinder is ok.
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Old 10-20-2016, 06:25 PM   #4
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Hi all, Im finally getting around to posting an update on the durango. Well she runs, I started with checking the connectors, unplugging and plugging them back together. This kept reducing the amount of codes I was seeing until I was just down to the cylinder 7 mis-fire code. I removed the plugs and they were fuel wet, but ok no carbon or bad gaping. Anyway I also had read about valve spring breakage so since I had the coil packs off already I removed the drivers side valve cover for a peak. Was not as hard as I thought it would be to do. Everything under the cover looked good and in the right places. I buttoned it back up and being late I put number 7 plugs into cylinder 1 and also swapped the coli packs around to see if the miss would travel. Started it up and it was smoother still and I cleared all the codes but it still was missing through the exhaust. Now I was getting just the random misfire code instead of a numbered cylinder. i
I also had read about some intake leaks and about cowl water leakage. No leaks on the intake. I did change the mass air sender with one from my truck and restarted the engine it was little rough at first and then she finially smoothed out. cool! its fixed! I had a feeling that this was more electrical PFM than mechanical. I washed the durango and took it for another ride and was still ok. I opened the hood to check on this leak thing and sure enough I could see water dripping right down onto the throttle body and cylinder 7. Anyway the wife took the Durango and of course 7 miles from the house it started acting up again. I got it home and was playing with the number 7 fuel injector connector and that is what my problem is. The connector is not sealing and the water is getting into it causing the misfire. I don't know if my water forging drive or the rain or just timing but so far so good. I understand there is a upgraded cowl and seal for these years so i'm going to look into that in the mean time I sealed the push lock (christmas tree) with some RTV and i don't see anymore water leaking onto the engine. hope this may help someone else out.

Good thing for the edit button
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Old 10-20-2016, 06:32 PM   #5
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Nicely done....
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Old 10-20-2016, 07:03 PM   #6
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good thing for the edit button, I should not be typing and drinking gentleman Jack at the same time...LoL
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Old 10-21-2016, 04:13 AM   #7
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I use dielectric grease on connections which helps to keep moisture out of them.
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Old 10-22-2016, 07:22 PM   #8
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in addition to everything i did use the dielectric grease also. Learned about that grease when repairing my NSS (Neutral safety switch)on my jeep Cherokee.

Thanks so far running good....
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Old 10-22-2016, 08:00 PM   #9
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Cool deal!
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Old 10-23-2016, 06:58 AM   #10
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