Nissan 370Z Forum - Service engine soon...

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Nissan 370Z Forum (http://www.the370z.com/)

- Engine & Drivetrain (http://www.the370z.com/engine-drivetrain/)

- - Service engine soon... (http://www.the370z.com/engine-drivetrain/120030-service-engine-soon.html)

TreeSemdyZee

12-30-2022 09:40 PM

Quote:

Originally Posted by demoz34 (Post 4033615)

What if I've cleaned and repositioned throttle bodies, cleaned MAF sensors, replaced pcv valves, spark plugs and ignition coils and still have the code and high idle

Just curious. Have you checked your oil level?
I overfilled mine a few years ago and the idle went nuts.
I had to do a long drain of the oil due to the air bubbles in the oil.

Averying

12-31-2022 06:57 AM

Quote:

Originally Posted by demoz34 (Post 4033615)

What if I've cleaned and repositioned throttle bodies, cleaned MAF sensors, replaced pcv valves, spark plugs and ignition coils and still have the code and high idle

Exhaust leaks and 02 sensors would be two things worth checking as well.

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Natrix

01-03-2023 12:57 AM

Quote:

Originally Posted by demoz34 (Post 4033615)

What if I've cleaned and repositioned throttle bodies, cleaned MAF sensors, replaced pcv valves, spark plugs and ignition coils and still have the code and high idle

Welcome to the P0300 club! :hello:

Feel free to take a look at my diagnosis for the same issue, and maybe we can learn from one another: http://www.the370z.com/engine-drivet...0300-saga.html

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