P0301-Cylinder misfire

[jlroman2]

I got all this work warranty approved. Took care of the engine misfires and catalytic converter codes.

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[aham23]

Any coolant loss, white smoke?

no warning signs at all. just instant rough running and check engine light.

 

[aham23]

dropped off today and new code popped up; P105C. Stuck intake valve...

of course it takes two weeks to get the appointment, 3 days to diagnose it, then who knows to fix it.

 

[speedymart]

dropped off today and new code popped up; P105C. Stuck intake valve...

of course it takes two weeks to get the appointment, 3 days to diagnose it, then who knows to fix it.

Just out of curiosity are you using an aftermarket oil filter? Started getting a few of these in with VVL issues like yours being caused by aftermarket oil filters clogging preventing proper oil flow.

 

[aham23]

Just out of curiosity are you using an aftermarket oil filter? Started getting a few of these in with VVL issues like yours being caused by aftermarket oil filters clogging preventing proper oil flow.

dealer has done the 3 oil changes so far as I have some free ones. in fact they just did service on it 3 weeks prior to the codes.

 

[speedymart]

dealer has done the 3 oil changes so far as I have some free ones. in fact they just did service on it 3 weeks prior to the codes.

Possibly just a failed VVL solenoid or rocker arm then

 

[aham23]

Possibly just a failed VVL solenoid or rocker arm then

got a call Friday. they are moving it to the next team who has to tear into the engine....low compression and they can not find the cause....yikes.

2021 JLUR some minor suspension/lift mods.

 

[mwilk012]

The cause is going to be a failed rocker arm on that cylinder, intake side.

 

[speedymart]

The cause is going to be a failed rocker arm on that cylinder, intake side.

Yup, going to agree. Looks like a rocker is stuck in low lift mode resulting in low compression. The VVL DTCs kind of gave it away. They'll pull the covers find which arm has failed and replace it. Not a big deal.

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