Can anybody tell me how these numbers look

[Brahmajoe]

Screenshot

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[PuddleJumper]

Is it misfiring? cus that looks fine to me? trim is just fine tuning right? as long as total rail pressure is good and the injectors are firing when they are supposed too. I wouldn't give it much more thought.

 

[Hootbro]

Those numbers are nothing I would be concerned about. Ideally a perfect trim is 0% but no vehicle will ever be that. Generally does not become an issue with fuel trim until the numbers go beyond +/- 10%.

 

[Brahmajoe]

no codes but when I hook up to JScan bank 1 shows misfires on 1 , 3, 5. In a 20 minute ride I had 13 misfires on 3, 5 on 1, and 3 on 5. I thought maybe the upstream 02 on the right was being weird since the short term trim was -4.60 and the drivers bank 2 was 0.00. No misfires on bank 2. Cylinder 3 consistently has the most misfires. Changed plug and coil. No change.

 

[Brahmajoe]

no codes but when I hook up to JScan bank 1 shows misfires on 1 , 3, 5. In a 20 minute ride I had 13 misfires on 3, 5 on 1, and 3 on 5. I thought maybe the upstream 02 on the right was being weird since the short term trim was -4.60 and the drivers bank 2 was 0.00. No misfires on bank 2.

Also I have a vibration at idle and stop, it’s nothing crazy but I def feel it and see the engine vibrating as well

 

[Brahmajoe]

One of my current drives

 

[Hootbro]

One of my current drives

That is could be one of my daily commutes misfire count also. I have single digits except for my #4 and it is usually in the teens also.

I know Jeep has updated the PCM software more than a few times and each time they have spread out the tolerances for what counts as a code setting criteria for a misfire.

Not saying it is "normal" but also the dealership is not going to entertain troubleshooting it until codes set.

 

[Brahmajoe]

Yea I been to them a couple times and jeeps vibrating is normal so I have to figure it out in my own :/ it starts up good but when RPMs settle it has a vibration. And at stop signs etc. I notice some times on and off the brakes effect it as well, and I belive there is a correlation between the 02 and lambada when brake pressure builds. Idk I’m an idiot lol. Parts canon baby!!!!

 

[Hootbro]

Yea I been to them a couple times and jeeps vibrating is normal so I have to figure it out in my own :/ it starts up good but when RPMs settle it has a vibration. And at stop signs etc. I notice some times on and off the brakes effect it as well, and I belive there is a correlation between the 02 and lambada when brake pressure builds. Idk I’m an idiot lol. Parts canon baby!!!!

I do not have the vibration and really do not have any drive-ability complaints.

Your brake thing you mention does seem weird only for the fact the there is a separate vacuum pump motor and no manifold vacuum is tapped for anything I know of. I do know the brake switch has a travel sensor to it and mainly that is for the start/stop but it maybe possible the PCM senses it and adjusts engine trim off it.

 

[ShadowsPapa]

Is it misfiring? cus that looks fine to me? trim is just fine tuning right? as long as total rail pressure is good and the injectors are firing when they are supposed too. I wouldn't give it much more thought.

If the numbers are really skewed, it can mean a bad O2 sensor.......... but just what we see above isn't really going to say much without a lot of other digging.
There's been people find sensor issues by watching those numbers - an O2 sensor shorted by a valve cover oil leak will lead to the system trying to change the fuel sprayed in, resulting in misfires.

I'd have to dig into my past screen shots when I was diagnosing my 2022's hot restart misfire issues.
When it wasn't a hot restart, my misfires always stayed in the single digits, usually around 0 to 5, but when it was a hot restart misfire, I saw misfires in the teens and hundreds, at least one time over 1,000 misfires in just about 2 minutes (it was a total dropping of #1 for that time)
I don't recall what the trims looked like at those times, I sort of forgot about it because it's resolved and is a very weird, obscure, problem, not often seen.

Yea I been to them a couple times and jeeps vibrating is normal so I have to figure it out in my own :/ it starts up good but when RPMs settle it has a vibration. And at stop signs etc. I notice some times on and off the brakes effect it as well, and I belive there is a correlation between the 02 and lambada when brake pressure builds. Idk I’m an idiot lol. Parts canon baby!!!!

#3 is higher than i see in mine - but it's not enough for a "vibration".
Vibration indicates or suggests something fairly constant.
I don't know what the time frame was for your 17 misfires on #3.
I can drive 15 miles and not see that many.

(my issue was misfire on hot restart only - and it hadn't yet learned CCDIFF)

I see a few misfires after a cold start - single digits, once in a while on some cylinders, but once it's run a few seconds, the misfires stop.

 

[Brahmajoe]

If the numbers are really skewed, it can mean a bad O2 sensor.......... but just what we see above isn't really going to say much without a lot of other digging.
There's been people find sensor issues by watching those numbers - an O2 sensor shorted by a valve cover oil leak will lead to the system trying to change the fuel sprayed in, resulting in misfires.

I'd have to dig into my past screen shots when I was diagnosing my 2022's hot restart misfire issues.
When it wasn't a hot restart, my misfires always stayed in the single digits, usually around 0 to 5, but when it was a hot restart misfire, I saw misfires in the teens and hundreds, at least one time over 1,000 misfires in just about 2 minutes (it was a total dropping of #1 for that time)
I don't recall what the trims looked like at those times, I sort of forgot about it because it's resolved and is a very weird, obscure, problem, not often seen.


#3 is higher than i see in mine - but it's not enough for a "vibration".
Vibration indicates or suggests something fairly constant.
I don't know what the time frame was for your 17 misfires on #3.
I can drive 15 miles and not see that many.

(my issue was misfire on hot restart only - and it hadn't yet learned CCDIFF)

I see a few misfires after a cold start - single digits, once in a while on some cylinders, but once it's run a few seconds, the misfires stop.

It was probably a 20 to 25 minute drive. I’ve tried it a few times this week and most cylinders stay in the single digits. Bank 1 usually has 10 or more with cylinder 3 having the most always. I did notice at a start up with higher rpm’s it seems fine then when it settles around 600 it starts its vibration, would that be a characteristic of the O2?

 

[Brahmajoe]

It was probably a 20 to 25 minute drive. I’ve tried it a few times this week and most cylinders stay in the single digits. Bank 1 usually has 10 or more with cylinder 3 having the most always. I did notice at a start up with higher rpm’s it seems fine then when it settles around 600 it starts its vibration, would that be a characteristic of the O2?

I do have to check to see if there’s oil on the sensor, I just have to peel back the liner for that right?

 

[Brahmajoe]

I do have to check to see if there’s oil on the sensor, I just have to peel back the liner for that right?

Also to add at idle when it’s vibrating I don’t see any counts of misfire it’s only while driving

 

[Hootbro]

Also to add at idle when it’s vibrating I don’t see any counts of misfire it’s only while driving

Is the vibration at every stop and never goes away?

Symptom wise with no misfire count at stop or idle, that usually points to motor mounts but I have never heard of bad motor mounts on these vehicles yet.

 

[Brahmajoe]

Is the vibration at every stop and never goes away?

Symptom wise with no misfire count at stop or idle, that usually points to motor mounts but I have never heard of bad motor mounts on these vehicles yet.

Not leaking I checked them. I just figured the misfires that out weighed the amount on bank 2 where pointing towards something

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