maxkoch1

370Z running lean

Alright, Z enthusiasts, I'm pulling my hair out here. My 2010 Nissan 370Z (gasoline engine) is running way too lean. I'm talking seriously reduced power, the dreaded check engine light is mocking me, and the engine is running rough as guts. Plus, it's jerking like crazy when I try to accelerate. I've got 191601 km on the clock. What gives? I'm thinking it might be the injection valve/injectors. Could it be something else entirely? I've heard whispers about the catalytic converter, spark plugs, mass air flow sensor, throttle body, and oxygen sensor. Where do I even start?

A 2010 Nissan 370Z is experiencing a lean running condition, characterized by reduced power, a check engine light, rough engine performance, and jerking during acceleration. Potential causes include faulty fuel injectors, vacuum leaks, a defective mass air flow sensor, or issues with the catalytic converter, spark plugs, throttle body, or oxygen sensor. After considering these possibilities, the owner sought professional diagnosis, which revealed that three fuel injectors were faulty, and replacing them resolved the issue.

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4 comment(s)

It is indeed unfortunate you are experiencing these issues. The symptoms you describe are indicative of a lean running condition. Several components can cause this. Have you checked for any obvious vacuum leaks? A faulty mass air flow sensor could also provide incorrect readings, leading to a lean mixture. It is important to perform a diagnostic test to retrieve the specific error codes. Have you done that yet?

Yeah, I forgot to mention I pulled the codes. It's throwing codes related to running lean on both banks. Vacuum leaks...hmmm, I'll have to give that a look-see. Is there a way to test the MAF sensor without just throwing parts at it? I hate just replacing stuff without knowing for sure, you know?

Indeed, replacing components without proper diagnosis is not advisable. Given the error codes for both banks, a defective mass air flow sensor is plausible. While testing procedures exist, they often require specialized equipment. Considering the complexity and potential causes, including the fuel injectors themselves, seeking a professional diagnosis is recommended.

Thanks for the advice. I appreciate you confirming my suspicions about the injectors, and the sound advice on getting a pro diagnosis. Bit the bullet and took it to a reputable workshop. Turns out, three of the injectors were shot. 515€ later, she's running like a champ again!

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NISSAN

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370Z