Hi, I just bought a black 2003 350z with 80k kms on Friday. I test drove it a couple of times, everything seemed to be in order.

The car would start just fine on cold starts with no abnormal dips in rpm after initial rev and would go to idle. I noticed after the engine being warm when I shut the car off and restart it, the start is strong, but after it revs up the rpm drops to about 0 then goes up to normal idle and is fine. This happens EVERY TIME on a warm start and twice it has stalled.

The car idles great, it has no hesitation with acceleration and otherwise seems solid. Does anyone have any suggestions on what it might be? I have had some people say it might be the TPS, but no check engine light appears. Wouldn't a TPS problem generally set off a code? Maybe fuel injectors?

Thanks

 

Try this...

https://my350z.com/forum/6008226-post3.html