Ok so my 05 Z has starting problems which **** me off to no end. The weird thing is that it really only happens when its summer time or it starts to get warm. In the winter time it starts right up. I turn the key and the car is trying to start but it wont turn over. Everything seems fine but it just wont turn over to start. Sometimes it will start the second time I try other tiems it takes f'ing 10 to 15 mins to start. I was gonna go to the bank right now but pos wont start and it is warm today. Now i like my Z and I called is a pos cuz im pissed off right now. Anyways Ive see a couple of other threads saying it could be the keys. Ive only ever used one key to run it. I have tried my second key before and it did the same thing. So that kinda rules out the key problem. Any suggestions out there?

 

https://my350z.com/forum/maintenance...g-problem.html

My 05 z has the same problem...read my thread about it, pm me if i can help in any way

 

Is the car "trying to start" as in, turning over, or is it not trying ot start? I can't tell from your post.

Is the engine or starter doing anything at all when you turn the key?

 

Suggestion: Next time it won't crank, try disconnecting then reconnecting the IAT/MAF sensor (5-wire connector just behind the airbox). Now try to crank it.

I have a similar problem, and doing this seems to get it started. Haven't figured out why yet though.