My nissan 350 z runs but doesnt rev past 2k and when I pr...

Hello, My name is\*\*\*\*\*'ve been working on cars since 1990, I have been a Just Answer expert since 2008. Thank you for contacting us for assistance with your vehicle. I will be happy to assist you. You will see an option to receive a phone call prompted by the website, you can agree to or decline. If you do not wish to use the Phone Service, we can continue chatting this way back and forth until you are satisfied with my help. Just keep in mind, it does take me time to respond. I am a Automotive Technician, I am not a fast typer. So lets get started.... Can I ask to whom I have the pleasure of speaking with today?

Ms. Arroyoyeah a call is fine

Hello Arroyo, Nice to meet you! I am sorry to hear about the problems you are having with your 350Z. Let me explain what I feel maybe causing your issue. This is most likely due to a bad MAF Sensor. 90% of the time the MAF ( Mass Air Flow ) sensor heated element which meters the air so the computer can add the proper fuel mixture has fallen out of spec. Not enough to cause a Service Engine Soon light but enough to cause the Air and fuel Mixture to be so off it can cause No Start, Stalling, poor acceleration, won't rev over a certain Rpm ( Normally around 2k rpms ), and running issues. I would have the Air and Fuel mixture readings checked to verify. Checking the voltage will not show the fault, the air and fuel mixture will. If found to be bad, do not replace with a After Market one. After market MAF sensors never seem to work properly. There heated element doesn't work right which can cause 02 sensors to flat line and have you chasing you tail trying to figure out what is wrong. So the only way to correct this issue if you do have a bad MAF sensor is to replace it with a OEM.

How do I know for sure its the maf

You would need a scanner to verify, but this certainly does sound like one. Do you have a Service Engine Soon light on?

Do you know what fault codes you have stored?

NoId have to get a quote

So then the first thing you will need to do is to have the car scanned to see what fault codes you have to determine direction of repair and see if my thoughts are correct.

OkayThank youThat will be all

You're welcome and thank you for using JustAnswer.com Kind Regards, Jay!