Code p300

[Stan H]

High lift will kick in when more "power" is needed, such as a heavy pull, towing up a hill, or when heavy acceleration is needed.
They start up in high lift as well.

Oh yeah forgot if you place it down harder and its under load I forgot it will do that. Good point

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[Stan H]

I personally would love to pull his plenum and valve pan too. I hope they let him take pics.

 

[Jteakus]

They want to do an engine so if there is a problem the engine manufacturer or rebuilder will be responsible for any internal failure. If the shop goes in it and there is a failure it is on them.

Still haven't heard what the cause of misfire diag is.

 

[Jteakus]

Cam replacement isn't really that bad on the 3,6

 

[ShadowsPapa]

Cam replacement isn't really that bad on the 3,6

Worse on the bank 2 - which his apparently is.

They want to do an engine so if there is a problem the engine manufacturer or rebuilder will be responsible for any internal failure. If the shop goes in it and there is a failure it is on them.

Not sure what that's supposed to mean - they are saying he's got a misfire on 3 cylinders so needs an engine replacement. Has nothing to do with anyone going into it.

 

[Jteakus]

As far as problems, if any, after the repair is what I meant.

 

[Lost1wing]

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They want to do an engine so if there is a problem the engine manufacturer or rebuilder will be responsible for any internal failure. If the shop goes in it and there is a failure it is on them.

Still haven't heard what the cause of misfire diag is.

That's in the "aw shit" flow chart. "Can you blame someone else, no problem."

 

[Supazuk]

Update, brought it to another shop, they they said miss fires on a multiple cylinders all on one side 2,4,6,8

said it could be cam but didn’t confirm. Suggested I’d get the engine replaced.
Same code. He said It only miss fires accelerating, not when it’s just idling.

I guess no one want to really repair it around here, should I try another shop?

or am I’m looking at a new motor…

thanks boys for all the input

Yes, I had forgotten that little detail - under acceleration is when it shifts into high lift mode, and that's where the issues lie with these, not in low lift.

Here's what I'd be tempted to do - IF IT WAS ME, and my money and my Jeep -

II'll make a deal with you - you pull that valve cover off and if it's NOT the cam and the cam looks great, I'll pay for that time. BUT I must be allowed to see the cam myself and take pictures.

IF the cam is toast - you fix it and that time is counted as part of the overall repair and nothing extra.

But then my head says - like Hootbro sort of "suggested" - would I want such a shop doing that sort of work?

(actually, I'd fix it, but if my situation didn't allow for that........... )

along the same lines if it were mine I'd have the valve cover off already at home...
However that being said If I found myself in the OP's shoes where I was not able to do work, there is no planet that I would be taking a vehicle that is not under warranty to a Dealership!
I would ask around and find a competent independent shop that specializes in jeep / Dodge vehicles. Mark, I suggest doing a little homework on local shops that do real diag maybe go to the Mid atlantic staging area here or JL forum and ask around

one here
https://www.jeepgladiatorforum.com/forum/threads/trusted-shops-for-lift-installation.38814/
one on the JL site
https://www.jlwranglerforums.com/fo...or-good-reliable-mechanic-in-north-nj.140079/

 

[DennyInDayton]

I'm not clear on whether you took it to an independent shop for the second opinion, or another dealer? I'd shy away from dealers for this kind of work, "replace" seems to always be really high on their flow charts.....sometimes before "diagnose".....

 

[Mark42]

Hey the second opinion I took it to a local shop, it was recommended by a jeep local parts store. This morning I took it to a third place, buddy mechanic. He’s looked at the codes and he told me he he’s going to open the valve cover!

progress boys !

 

[Supazuk]

one more thing why is jeep doing whole motors and not just replacing a head assembly
also why are there Zero performance valvetrain / head upgrades ?

 

[ShadowsPapa]

one more thing why is jeep doing whole motors and not just replacing a head assembly
also why are there Zero performance valvetrain / head upgrades ?

It's the dealerships, not Jeep.
Bet this is nothing to do with warranty - but if it is under warranty, why the heck not let Jeep pay for it, engine or cam, either way?

When there's no warranty, the dealership calls the shots - messing with cam replacement or just sell an engine and be done with it.
When there's warranty, Jeep likely won't let them replace a whole engine just for a cam and followers when Jeep has a TSB on this very topic!!

 

[Stan H]

Worse on the bank 2 - which his apparently is.



Not sure what that's supposed to mean - they are saying he's got a misfire on 3 cylinders so needs an engine replacement. Has nothing to do with anyone going into it.

Update, brought it to another shop, they they said miss fires on a multiple cylinders all on one side 2,4,6,8

said it could be cam but didn’t confirm. Suggested I’d get the engine replaced.
Same code. He said It only miss fires accelerating, not when it’s just idling.

I guess no one want to really repair it around here, should I try another shop?

or am I’m looking at a new motor…

thanks boys for all the input

@ShadowsPapa already pointed it out
But I cant wait to see that 8th cylinder
Dude Get another shop crap even though I am a bonafide shade tree mechanic ( post pic of my training certificate written in crayon but trying not to be too long)
But at least I know a 6-cylinder doesn't have an 8th cylinder

 

[Mark42]

Boys shop just called,

He changed spark plugs and coils, he said it’s running smooth, on the way to pick it up now. Said I must have put shit gas/ stop putting regular gas. But I’ll get more info when I see him

 

[Hootbro]

Shit gas would cause all the cylinders to misfire. Nor do multiple coils just go out at once. Hope it works out but I would temper expectations

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