For me, once I took the car out the dealership, it's never gone back. I had the same thing happen to me, and at around 30K I took apart the throttle bodies and cleaned them, no more problem so far. I also have Uprev cable and I'm able to see which codes it's throwing. If you feel comfortable taking it to the dealer take it :tup:

:iagree:

So i took my car to the dealer yesterday and they said it might be getting to much air from the K&N air filters?! so they put the stock air filters back in to see if that fixes the problem. does that make any sense to anyone else? it has to be the throttle bodies. are they hard to take out and clean?

Lol no. Do you have an alternate dealer around?

put ur K&N's back in an go to another dealer...that's nonsense

In my Z the dealer prove everything... In that moment i have K&N drop ins too... they changed for the OEM's one and the problem still, they also change the MAF sensors and the same problem again... they ending up cleaning the throttle bodies and then problem solved... Thanks to God no more issues again... soo I recommend you to tell that to the dealer to see if that can fix your problem.

BTW I dont know but I see that this problem are more common on the 2013 Z:icon14:

thanks for all your help guys. I'm going back to the dealer this weekend. i'll let you know how everything goes.

good luck my friend :tup:

:iagree:

I have my K&N filters on and have had no issues for months after cleaning the throttle bodies. However, you have to be careful in how much you oil your filters, that will definitely mess with your maf readings if excess oil gets on them OP.

:iagree:

my car did it again the other day, I'd say it was a consistent percentage I was about to accelerate like roughly 20%. pulled over an shut the engine down then on start up it was back to normal.
talked to jack from HP logic and he said he can tune it out so it doesn't happen again.

So, I figured I would update from my perspective now since it's be a little while...

As I said previously, the dealer was convinced that the K&Ns where over oiled which was causing issues with one or both of the MAFs. I noticed that cleaning the MAFs seemed to help for a few weeks but eventually it would go back to consistent losses in power or limp mode.

As of this last winter, things got really bad. My car started to regularly go into limp mode and threw codes far more frequently than before. Cleaning the MAFs had little to no effect on the situation and sometimes restarting after the oil temps raised the needle just off the floor seemed to help for a single trip (until the car was parked for the day for instance). Sometimes after this cycle, the CEL would come up and the same codes that were previously pre-failed would now be failed.

So I started to systematically replace parts that the dealer mentioned and get it to a state where either it would fix the situation or prove that the problem was not what the dealer was claiming it to be. I started by removing the K&Ns and making sure everything in the intake was fresh and clean, then replacing them with brand new stock air filters. Then I replace the driver's side MAF. The car ran good for a single trip then went to limp mode. I considered moving the MAF to the passenger's side and putting the other in but ended up saying screw it and just ordered another replacement MAF. (This way, both are replaced and the dealer has no leg to stand on anymore.) Again, after replacing the second MAF the performance was good. In fact, the performance was GREAT, way better than it had been in a while. Drove that way for a few trips then BAM, something started to feel off... Ran the codes and sure enough, pre-failed P0101 and P010B. No oiled air filters, two brand new MAFs; this problem is not due to fault sensors and/or caused by the air filters, I'm now convinced.

I have an extended warranty for my Z so I will be bringing it into the shop soon (probably when I go to get my winter's rotated off) and raising a small but rather steamy level of hell! I'm thinking about pointing them in the direction of the throttle bodies and telling them to clean and handle the relearn process.

I'll update again once this is done. Thanks for all of the information everyone has shared thus far, it is really helpful! :)

Hope you can resolve the problem soon bro! I paid that the problem are the throttle bodys... like happen to me P's_z...keep us updated my friend! Good Luck :tup:

I live near you, could you tell me which dealer you went to for this?

:iagree:

Tell them that this has happened to people you know and cleaning the TBs has worked for them. Hell, even show them this thread as evidence. I dont know why not all nissan dealers are in the know of this. You are not the first person that this has happened to, i would have expected for word to have spread by now, and for the dealers to have sent this to the central offices and this issue-fix be informed to all. :shakes head: