Chasing misfires on driver’s side (4,5,6)

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Granelli

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Out of curiosity, how was this determined? Did it throw a code or something else you were able to trace?
Thanks!
 
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Quiker

Quiker

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I was only throwing misfires on the driver's side bank - 4,5,6 - swapped plugs, tested coils. Then looked at all the hoses and tubes that were hanging of that side of the intake. Once through all that - I was either dealing with a cam/cam phaser issue - or something common to those three cylinders - and downstream. led me to the cat.

If you pop out the O2 sensor between the turbo and cat - I was building pressure there - which led me to believe it was clogged.
 
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