I've searched already but nobody has reported symptoms like mine. So my G35 I picked up had been sitting a few months because seller was serving overseas. It has 120k miles and well maintained. It starts and idles for one second then dies. Then I start it again and it runs and idles like normal. But this does not happen each time. Since I start and stop my car at least 10 times a day for my sales job I say it will do the funny start 2 out of the 10 starts. Same thing on cold starts in the morning, where some mornings its fine some it takes 2 attempts and its always 2. I was hoping the change of new plugs, clean K&N, oil change, seafoam in tank would help but nope. I just did the seafoam in vacuum and will see what happens tomorrow and the rest of the week. But anyone ever exerience this also?

 

Cam or crank sensors

 

What he said..

 

Well that's a start thanks??? So am I supposed to replace cams? I know they are stock. I will start looking into replacing sensors.

 

No, just the sensors.

 

Try doing the idle relearn procedure and see if that helps

 

It's called the Cam Positioning sensor. There are two: one for passenger side of engine and one for drivers side of engine. There is also an engine crankshaft sensor.