Misfires on Cylinders 1, 3, and 5 only.

BrendenZ34

My 370z is currently at the dealership being looked at for misfires in the above cylinders only. Does anyone have any possible ideas on what could cause this? I have tried fuel injector cleaner and filled up with fresh gas. But no change. Any suggestions are helpful just curious what y'all think could possibly cause misfires on one side of the motor (one bank) and not the other. Car has 31 thousand miles.

Update 1: Determined that all sensors are in working order and in good shape. So it is not a sensor causes the issue.



2019 370z Sport 6MT
Mods:
-Z1 CF Cold Air Intakes w Race intake upgrade
-Tomei Cat back exhaust
-Ecutech Tune from Z1


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filip00

I would focus checking everything on that bank. The fuel rail, coils, whatever is only on that bank, I'd change/check to see. I'm not sure if it makes sense to check ECU and other stuff, that impact both banks, but I'd currently just check whatever is already "divided" to that bank.

BrendenZ34

The number one thing I have found online is the cat to that side of the motor could be clogged or damaged. But I'll look things over and see what I can find and I'll keep this thread updated with a solution for anyone else that may need it in the future.

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BrendenZ34

UPDATE FIXED!

Nissan replaced fuel injectors underwarranty, no change, but they did track it to fuel deprivation so they check the fuel rails, turns out a mouse found his way in there and eaten part of the fuel injector subharness causing misfires on one bank not the other. So the issue was the Subharness I'll update one last time once it is installed to make sure everything runs smoothly. Thanks for everyones help!

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