mine has done this for over 2 years. it fires up on the second start though.

After 63k miles, I'd go ahead and clean the MAFs and see if that helps. Even if that's not the problem, they could probably use a good cleaning by now. I've done it and it's VERY easy. If you have a Phillips screwdriver, the only cost is the MAF cleaner. No gaskets to worry with. No recalibration/training required. The hard part is unplugging the connector and that's pretty easy.

Cleaning the TBs is not what I would call an easy job but, going by the DIYs and comments on this site, it's not all that difficult for your average weekend mechanic. Looks to me to be one (small) degree of difficulty above changing brake pads.

i cleaned my MAF's after i cleaned and re-oiled my K&N drop in filters. doing this did nothing to fix the issue. (i thought i might have fouled the MAF's when i re-oiled the filter, so i cleaned the sensors a week after the K&N's were cleaned)

Cleaning the Throttle bodies is not hard and you can do it without having to do the gas pedal/TPS reset. When Cleaning the the TB's be sure not to unplug any of the electrical connectors or move the throttle plates. I've done it on my G35 a few times.

Doing the the TPS reset can be a PITA.

**edit** here's an excellent write-up.

http://www.myg37.com/forums/d-i-y-in...le-bodies.html

I took it to Nissan, I only had 1 month of warranty remaining. They checked for ecu errors and said they could not repeat the problem. Sent me off and said it was my K&N panel filters.

Luckily it was a common issue and the fix was easy. As you stated, cleaning the TB does not require disconnecting the electrical connections.

I love how the dealers don't even try anymore it ends up going like this

tech- hey I cant figure out whats wrong

serv adviser- well we don't make commision on this thing so blame it on some aftermarket part and send it off

tech- if you say so

It's the throttle bodies, I had the same issue at 30k. Cleaned them and everything was good. Now at 60k, I am having the same issues again. Need to just clean them.

Good to hear omgZ

Did you resolve this issue OP?

Not resolved yet. The only person that I trust touching my car now has been busy with his Z. Hopefully soon.

This happened for the 5th or 6th time today... Was thinking it was my spark plugs or fuel as well..

I don't trust myself to clean out my TB's. Do dealers clean that type of stuff under warranty? Or is that maintenance stuff thats not covered? Whats a normal shop charge to clean those puppies

Question: Is this a 7AT only problem?

Who might that be? :rolleyes:

TBs are definitely on the agenda this summer. Maybe in a couple of weeks - I'm out of town next week again.

It's just removing your intakes and a few bolts - piece of cake. I asked NTB a while back about this and the guy said I should just do it myself. Their charge was $60 for one TB. I expect it would be more for two like the Z has.

Estimate from my normal "shop" was about $100 before shop supplies. The only reason I didn't pull the trigger is because he said they would be using something that sounded more like a seafoam type product.

Well, it ain't the husband! :icon17:

63k miles haven't seen another high miled Z. I had your issue aswell and well that was my fault for not changing the plugs. But here's an example why that is happening for not changing spark plugs for 70k miles. Just a simple tune up and your good to go, problem solved :tup: Right now I'm at 76k and my baby is running Strong :D

[IMG]http://i1290.photobucket.com/albums/...pscfbc3e86.jpg[/IMG]

Hmm. A lot of folks reporting have AT's, but clearly some folks with MT's have the issue too... might have been barking up the wrong tree there.

I think this is a trouble shooting procedural matter -- unfortunately, one of process of elimination.

Start with looking for vac leaks, cleaning sensors, checking plugs, then TB's, etc.

Good luck!