Multiple cylinder misfires

[bwm2020]

Well needless to say after the 1st warning from the cylinder 4 misfires, replace plugs and coil packs, 3 months later it starts again. Shop changed the plugs again, still misfire, lifter/rockers started clanging. Now they went in to change them out and check the cams. Passenger intake cam is badly damaged. Oil is full of metal shavings. I took care of this thing, regular oil changes at dealership. Now at 140k mile, need new engine! So frustrating!

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[Hootbro]

Sucks to hear. Almost always seems to be the passenger side that lets go.

 

[PuddleJumper]

Well needless to say after the 1st warning from the cylinder 4 misfires, replace plugs and coil packs, 3 months later it starts again. Shop changed the plugs again, still misfire, lifter/rockers started clanging. Now they went in to change them out and check the cams. Passenger intake cam is badly damaged. Oil is full of metal shavings. I took care of this thing, regular oil changes at dealership. Now at 140k mile, need new engine! So frustrating!

i always call insurance and say i hit a puddle and the motor stopped working. shops dont care where the money comes from so i just find one that willing to go along with it. had 3 motors replaced across 3 different vehicles by insurance. cus i "hydrolocked" it.

 

[PuddleJumper]

Well needless to say after the 1st warning from the cylinder 4 misfires, replace plugs and coil packs, 3 months later it starts again. Shop changed the plugs again, still misfire, lifter/rockers started clanging. Now they went in to change them out and check the cams. Passenger intake cam is badly damaged. Oil is full of metal shavings. I took care of this thing, regular oil changes at dealership. Now at 140k mile, need new engine! So frustrating!

if you don't mind me asking, what was your oil change interval and did you use ESS or no?

 

[Hootbro]

i always call insurance and say i hit a puddle and the motor stopped working. shops dont care where the money comes from so i just find one that willing to go along with it. had 3 motors replaced across 3 different vehicles by insurance. cus i "hydrolocked" it.

Interesting

 

[PuddleJumper]

Interesting

yea im debating on doing it for my 3.6 when i comes out of warranty so i can get insurance to pay 70% of my hemi swap. then sell the actually working 3.6 and trans and basically pay only 10% of the original price quoted.

 

[bwm2020]

if you don't mind me asking, what was your oil change interval and did you use ESS or no?

Around 8k and no, tried not to use the ESS. Hate it!

 

[PuddleJumper]

Around 8k and no, tried not to use the ESS. Hate it!

hmm i wonder if the 8k might be an issue. in the owner manual its states to use 4k intervals if vehicle is extreme duty. qualifier being excessive idle, excessive dust, regular offroading, regular towing. ESS is more to keep idle time down, if you dont use it it may put in the extreme duty category. I use my ESS even tho its annoying, but still do 4k cus lots of offroad and tow use. I've also noticed idleing for to long the oil psi drops below 30 and i don't think thats healthy. I know oil starvation at idle is a thing for some generation of hemi, wonder if its the same for penstars.

 

[Lost1wing]

Stop with the insurance fraud ideas. That's not ethical and should not be encouraged. This kind of behavior doesn't belong here. Not even as a joke.

 

[Hootbro]

Stop with the insurance fraud ideas. That's not ethical and should not be encouraged. This kind of behavior doesn't belong here. Not even as a joke.

For the record, that was not lost on me either. Just found it interesting he was so matter of fact about it and had done it 3X before as he claims.

 

[SargeDiesel]

For the record, that was not lost on me either. Just found it interesting he was so matter of fact about it and had done it 3X before as he claims.

Just another reason why us squares keep paying higher rates... seems the kool kids are screwing us at every turn.

 

[ShadowsPapa]

Sucks to hear. Almost always seems to be the passenger side that lets go.

and it's another 2020...........

qualifier being excessive idle, excessive dust, regular offroading, regular towing. ESS is more to keep idle time down, if you dont use it it may put in the extreme duty category.

using or not using ESS won't be a factor....... excessive is leaving it idling for 15+ minutes at a time and yet there's a lot of these that do just that - just fine.

8K isn't horrible, either. I could technically go that far with my driving. In fact, my OLM states roughly 50% and I'm at about 4,000 on this oil. It may not make 8,000 but that's not odd in the winter. No, I don't go that long, but it wouldn't be a big deal if I did.
8 is still under 10, and probably what the typical Jeep driver/owner actually would see if going by the monitor.

. I've also noticed idleing for to long the oil psi drops below 30 and i don't think thats healthy. I know oil starvation at idle is a thing for some generation of hemi, wonder if its the same for penstars.

I guess maybe you don't understand oil pressure vs. lubrication, then. Historically, the rule of thumb has been 10 psi for every 1,000 RPM.
Pressure does not lubricate and with the high volume pumps, it's just plain no problem at all. There's more than enough oil volume - and if the holes are right, it's more than enough to squirt oil a long ways.
Heck, adjusting the lifters on a SBC at IDLE with the oil pressure being only 15-20 there was enough to shoot oil it all 16 rockers over the fenders on both sides.
These can go 100s of thousands of miles with the stock oil pressure situation.
These are hardly starving for oil at idle.
this is another 2020 and guess which side.......... interesting that it went over 100K............

For the record, that was not lost on me either. Just found it interesting he was so matter of fact about it and had done it 3X before as he claims.

On the AMC forum - it can be banishment. Selling VINs, titles, suggesting fraud, etc. Posts removed, users warned.

Well needless to say after the 1st warning from the cylinder 4 misfires, replace plugs and coil packs, 3 months later it starts again. Shop changed the plugs again, still misfire,

Man, when I read that, want to put part of the blame on the SHOP for not correctly even attempting a diagnosis! Geesh, a little time would have proven it to not be an ignition misfire. What's up - no troubleshooting skills these days? Jump right into coil packs and plugs every time there's a misfire. It's just silly. They are simply parts changers that keep throwing stuff at vehicles until something sticks and then they claim they figured it out! Right, they accidentally tripped over the real culprit.

 

[PuddleJumper]

and it's another 2020...........

using or not using ESS won't be a factor....... excessive is leaving it idling for 15+ minutes at a time and yet there's a lot of these that do just that - just fine.

8K isn't horrible, either. I could technically go that far with my driving. In fact, my OLM states roughly 50% and I'm at about 4,000 on this oil. It may not make 8,000 but that's not odd in the winter. No, I don't go that long, but it wouldn't be a big deal if I did.
8 is still under 10, and probably what the typical Jeep driver/owner actually would see if going by the monitor.

I guess maybe you don't understand oil pressure vs. lubrication, then. Historically, the rule of thumb has been 10 psi for every 1,000 RPM.
Pressure does not lubricate and with the high volume pumps, it's just plain no problem at all. There's more than enough oil volume - and if the holes are right, it's more than enough to squirt oil a long ways.
Heck, adjusting the lifters on a SBC at IDLE with the oil pressure being only 15-20 there was enough to shoot oil it all 16 rockers over the fenders on both sides.
These can go 100s of thousands of miles with the stock oil pressure situation.
These are hardly starving for oil at idle.
this is another 2020 and guess which side.......... interesting that it went over 100K............


On the AMC forum - it can be banishment. Selling VINs, titles, suggesting fraud, etc. Posts removed, users warned.




Man, when I read that, want to put part of the blame on the SHOP for not correctly even attempting a diagnosis! Geesh, a little time would have proven it to not be an ignition misfire. What's up - no troubleshooting skills these days? Jump right into coil packs and plugs every time there's a misfire. It's just silly. They are simply parts changers that keep throwing stuff at vehicles until something sticks and then they claim they figured it out! Right, they accidentally tripped over the real culprit.

so would you guess its a poor material issue not an oiling issue?

 

[ShadowsPapa]

so would you guess its a poor material issue not an oiling issue?

Two theories (and I believe, unless mistaken, a tech who knows his #!$% was thinking the same lines) - materials issue, OR, lash adjuster issue because the oil for the cam lobes and followers comes up through the lash adjuster, through holes in the exhaust follower and shoots onto the cam lobes of both cams.

We were seeing it more frequently in the 2020 model year Gladiator - a few in 2021, but not the numbers in 2022 or 23 model years. Something changed and it's not the pump or the oil.

 

[PuddleJumper]

Two theories (and I believe, unless mistaken, a tech who knows his #!$% was thinking the same lines) - materials issue, OR, lash adjuster issue because the oil for the cam lobes and followers comes up through the lash adjuster, through holes in the exhaust follower and shoots onto the cam lobes of both cams.

We were seeing it more frequently in the 2020 model year Gladiator - a few in 2021, but not the numbers in 2022 or 23 model years. Something changed and it's not the pump or the oil.

hmm. that makes sense. if it was an oil pump issue it wouldn't be year specific since we all have the same part number as far as i can tell. plus bad oil can't target one cam and not the other 3.

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