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Lbz knock

Okay. And I forgot to add the blow by coming out of the oil cap. Almost looks like white smoke.

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OK, it is most likely a misfiring cylinder. Which could be anything from a bad injector to a hole in a piston.

A code reader could narrow which cyl. it is and a compression test could tell the health of the cyl. Loosening an injector line, one at a time will also tell which cyl. it is by the quieting of the knock.
 
Efi is showing no codes that could be knock related. Only codes I am showing are for my grid heaters from the egr delete kit. I am an idiot when it comes to using the Efi scan tool. So I can't do any pid's. To check the balance rates.

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NVW said:
OK, it is most likely a misfiring cylinder. Which could be anything from a bad injector to a hole in a piston.

A code reader could narrow which cyl. it is and a compression test could tell the health of the cyl. Loosening an injector line, one at a time will also tell which cyl. it is by the quieting of the knock.
Click to expand...

This is NOT a 6.5! It is not safe to loosen lines on a common rail injection system one at at time!!! That is why the scanner/computer/etc will shut off the injectors for you one at a time...
 
I would start off with getting the stock tune back in there and being able to read the balance rates.
 
You have a cracked piston. I would almost bet.. Sorry :(
 
8100 I hope your wrong. But I kinda feel the same way. Cause a compression issue gets better as rpm increases correct? And if it was fueling it would do it constantly?

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marcusrushing90 said:
8100 I hope your wrong. But I kinda feel the same way. Cause a compression issue gets better as rpm increases correct? And if it was fueling it would do it constantly?

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Click to expand...

Have you done a compression test?

That will tell you for sure.. The harbor freight kit will let you use the glow plug hole and you can get your reading that way.
 
NVW said:
Try running it with the belt off and see if the knock goes away.
Click to expand...


How long is it safe to run with a belt off? I've only ran my jeep w/o a belt and that was to get it out of the barn once...and it was hot in less than 2 min, probably.
 
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