For the record, I've checked codes and had the MAF sensors cleaned. Up next will be cleaning the TBs and then a spark plug change.

GLWT hope your Z gets up to par :tup:

Pint,

I've been having the same issue over the last 2 months. The problem is very random like you said, but lately I've been trying to zero down on the culprit. Here's the info I've gathered so far and I hope it helps people here.

2011 Base Z - Auto - 50k miles
K&N Typhoon, BERK HFC, BERK CBE

- K&N Filters cleaned
- MAF haven't touched
- Spark plugs haven't touched
- Oil Change Full Synthetic Mobil 1 @ 49k miles
- New Battery
- Fuel pump and TB cleaned

The car ran smooth for about a week after getting the fuel pump and TB cleaned at Baker Nissan in Houston. After that the starting issue happened again. Took 4 tries before it would start. Just yesterday I was traveling across town at 5pm rush hour in 97 degrees weather. A lot of stop and go with my AC on. After about an hour I noticed that my RPM was dropping very low when braking in traffic. I turned off the AC to see if that was the issue. My RPM stopped dropping low after that but this needs more feedback and testing if anyone can help. I guess this also confirms that heat plays a role.

Also on Tuesday 6/17 I got off work and my car wouldn't start. I just replaced the battery 2 weeks before. Coworker gave me a jump and since then the car has been fine. I don't know what drained a new battery once and then work fine afterwards. Could this be connected to the RPM start issue?

UPDATE 6/20 11:50pm : Just was about to get a midnight snack but car battery is dead. I think its my factory car alarm that's draining the battery since this was the only time I didn't lock it since the first time my battery died.

Having the same damn issue, 3 diff dealers couldn't figure it out....i think ac may have a role in this...funny enough I was thinking to say screw it and trade it in for a beemer, but some beemers are having the same problem lol

N55 DCT stalling/dying at idle - Page 7

Any updates ?

Hey, Pintsize725. I think I may be having the same problem as you. My Nismo started ding that earlier this evening. I've had a full tank of gas for about a day now. I ran to subway to get something. It started up like normal. I was in the store for about 10 to 15 min. I came out and it took 3 tries; on the last try I pressed the gas pedal down a bit and it started. Luckily, there weren't any other cars around, but it was embarrassing to say the least. I've had the Gen 3 Stillen intakes for about a year with probably close to 20,000 miles on them. Does anyone know if the dealer cleans them with the scheduled maintenance? I had the 30,000 mile one done a couple of months back, and I'm wondering if they even touched the intakes. They were installed by Nissan back in New Orleans. I'm dreading the bumper removal bit :-/

The sensors? They should but probably don't. I'm glad I'm not the only one having this problem at least, I thought I was crazy.

I guess they would clean the sensors, but I was asking about the Stillen conical filters. I feel your pain. I definitely want to get to the bottom of it sooner rather than later since it's my daily driver. I plan on going to the dealership on Monday to get it checked out. If I get any hassle from them, I'm going to bring it over to the Z clinic.

I would almost say definitely not because it's aftermarket but I could be wrong.

I need to find someone to clean my TBs to see if it fixes it. I also feel like it might be part of a cooling/AC issue since I always have the AC on and run around in the Z during the hottest parts of the day. :/

I hear ya. I was kind of afraid of that. If that's the case, I definitely know where to start looking.

Im really thinking the AC and outside temp is playing a big role. I got my car back from the dealership and they said they couldn't find out what's wrong. Next day I was driving home from work and stopped by Walmart. So 15-20mins later I get to my car and it barely managed to start up. I'm starting to think that Baker Nissan in Houston did not clean my TB. Let me know if cleaning yours fixes the issue Pint.

It feels like it has a fuel starvation issue. My car feels slow and sluggish when driving. I'm going to try to get a tune-up and new spark plugs to see if that helps with the issue also.

Just double checking, are any of you able to keep the engine running by giving it some gas as it struggles to idle on start?

That's about a 50/50 chance for me. I've had instances where as soon as it happened once, I would try to restart and give it some gas but it would just rev high and then kill itself. The times it did work, it would rev up, almost die (shuttering and all) and then stabilize.

Update: Just spoke to a good friend of mine from Houston Z's. He says it could possibly be a heat soak issue with the intakes. I'm going to get my filters and MAF sensors cleaned and get back to yall by this weekend. I have K&N Typhoons which are short ram so I'm hoping this is the cause of the problem.