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Survey- For those with misfire issues

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I also have my fca engineer source digging around for answers, so we will see what he finds out.
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Hey All!
If you have had the P0300 code with check engine light & ESS light post your build date. DO NOT POST IF YOU HAVE NOT HAD THE ABOVE MENTIONED.
Lets keep the replies just to build date so its easy to decipher, not some long write up ok.
Build date is located on the sticker in the drivers door well.
Let see if we can narrow this down and find a pattern.
10/23/2019 6pm
Engine assembled in mexico
 
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Minnie2011

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11/19 - Mexico

(more detailed information on month/day/hour is not available as vehicle is in the shop at dealer)
 
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Hey All!
If you have had the P0300 code with check engine light & ESS light post your build date. DO NOT POST IF YOU HAVE NOT HAD THE ABOVE MENTIONED.
Lets keep the replies just to build date so its easy to decipher, not some long write up ok.
If you know your engine assembly location include it. ( should be on the vehicle sticker that shows all options & final price)
Build date is located on the sticker in the drivers door well.
Let see if we can narrow this down and find a pattern.
11/18/19 9PM Mexico
 
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How about you guys narrow it down and include the day as well?
It's on the sticker, lower right.
MDH is Month, Day, Hour. (hour 13 is 1pm, hour 15 is 3pm and so on) of final assembly.
However, the engine could be a week before that, I suspect.

With the DATE, you can tell if the issues started October 15th at 8am or October 30 at midnight instead of spanning 31 days.

(They should all be Mexico engines, should they not?)

OK - EDIT!! -
When looking at the door frame sticker, you will find the MDH part at the upper right if you do NOT tilt your head to read it!
IF you tilt your head to read the sticker AS PRINTED, it's actually the LOWER RIGHT part of the sticker if you were reading the sticker proper, as if before it was placed on the vehicle.
In any case, LOOK FOR MDH

Again, that is MONTH DATE HOUR
All in 2 digit format - 10 is October, 05 if the fifth day of the month, like October 5th, and 14 would be 2 pm.
ENGINES WILL BE BUILT DAYS AHEAD OF THAT - so you are really only telling the OP the FINAL ASSEMBLY date of your truck - and that isn't when it went out the door. Mine was done several days before the bed cover was put on and it left the plant for transport.

There should be an ENGINE BUILD sticker on the driver side of the engine..............
 
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How about you guys narrow it down and include the day as well?
It's on the sticker, lower right.
MDH is Month, Day, Hour. (hour 13 is 1pm, hour 15 is 3pm and so on) of final assembly.
However, the engine could be a week before that, I suspect.

With the DATE, you can tell if the issues started October 15th at 8am or October 30 at midnight instead of spanning 31 days.

(They should all be Mexico engines, should they not?)
Good point..
Ok everyone please edit your post to include the exact day and hour. Do not repost info or it's just going to make things confusing... only edit.. It can be found on the sticker in the door well.. look for MDH

Jeep Gladiator Survey- For those with misfire issues 20200822_141555
 
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(They should all be Mexico engines, should they not?)
The pentastar V6 is made in 3 assembly plants but i believe the JT is built only in mexico but this will let us know for sure.
 

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Couple things here, I don't have a Gladiator yet but I'll be placing an order in the fall. I'm following this with interest.

You guys are saying "build dates from Oct 19 to Feb 2020" so for all realistic purposes, everything built since Oct. The factory shut down for Covid somewhere in the neighborhood of that Feb 2020 latest occurrence, and you can either say they found and fixed the issue, or the few people that have a Gladiator since production restarted haven't had the issue pop up yet or haven't found this thread yet. Just my $.02.

Also a note on recalls - you guys do know that recalls are for safety-related issues, right? No one is going to recall a truck for engine scoring, or valve issues. It's not a safety issue. Is it a quality issue? Yup. Reliability? Yup. Not safety. No recall. At best, if they prove this is an issue they'll transmit a TSB. This is SOP for all auto manufacturers, if you're thinking FCA is playing games or "not standing by its' product" by not issuing a recall, they're not. They're behaving completely normally.

My '14 Mercedes E350 started making a ticking noise one day, took it in to the dealer. Got a new engine under warranty - wrist pins within a certain engine number range were machined incorrectly, creating piston slap. The second I drove in the tech knew exactly what was wrong because they'd already done 3 that month. However, again, not a safety issue, so no recall. There was a TSB that even had an audio recording of the tick and listed the engine numbers with the defect. Then, the dealer waits to see who has a failure and the information is there for them.

They're not just going to hand out engines to everyone. A large number of engines may be negatively affected by whatever happened on the line. Most probably won't. It'd be stupid of them to just call up everyone who bought a truck within a 7-month range and hand them a free engine. They'd go out of business. My MB engine was over $20K. I'd bet all in a new Penta engine with dealer labor and all is $10-$15k.

I've read every comment in this thread and followed it very closely since the day it started. I feel your frustration, and I know as well that one day when I order my truck, it very well may be my problem as well. But I really think that while there MAY be a defect causing a large majority of these issues, you have to realize one thing. You're trying to cure the common cold. A cold is a symptom for one of literally hundreds of possible infections in the body. Likewise, a misfire is a symptom of one or more of hundreds of possible failures in an engine. In one guy's truck it could be valvetrain issues. Another guy's it could be loss of compression. A third guy very well could have had bad gas. However, they are all going to manifest the same way and cause the same indications. The AS/S automatically locks out when a misfire is detected so that light isn't the least bit helpful for diagnosis. Now, for it to be this common among new trucks with minimal mileage, yeah, something's up. But my bet is, it's more than one thing, and we just have to thank God for warranties until they figure it out.

Believe me, coming from the Audi (and other Euro) community, you learn a thing or two about misfires.

Darel
 

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As the original creator of this thread, I've been pretty lax on monitoring this but from now on unless you have direct knowledge of the misfire p0300 and Ess issue from FCA or the dealer, or you have directly had these lights & codes the i ask people to refrain from posting here.
This was supposed to be thread to survey & help those directly affected & give updates on fixes. Not a discussion thread of what could & couldn't be the problem. We could all make assumptions but only those that have had the issue & have worked with a dealer & FCA only have pertinent information. Not trying to be a dick but its really hard to have a survey & good data when there is 53 pages to sift thru.
 
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im working to figure out where the engine is stamped with the assembly date so this so we can include this with our build date info to narrow this down further.
If anyone know chime in.
 

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How about you guys narrow it down and include the day as well?
It's on the sticker, lower right.
MDH is Month, Day, Hour. (hour 13 is 1pm, hour 15 is 3pm and so on) of final assembly.
However, the engine could be a week before that, I suspect.

With the DATE, you can tell if the issues started October 15th at 8am or October 30 at midnight instead of spanning 31 days.

(They should all be Mexico engines, should they not?)
Hi, on page 43, lewishouse indicated his engine was made in US. As I recall, it may be the only posting of one made in the US instead of Mexico.
 
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Hi, on page 43, lewishouse indicated his engine was made in US. As I recall, it may be the only posting of one made in the US instead of Mexico.
My guess is that all JT engines are made in 1 plant since they have VVT technology and other things the other pentastar V6 engines don't have, I believe.
I'm working on getting a definitive answer from my FCA source but everyone should have the correct engine assembly listed on their window sticker from the dealer.
 
 







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