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DIGItonium · 05-18-2011, 10:10 PM

It's weird... G37 owners first reported a couple of things:

Poor throttle response due to the choice of motor oil, which Nissan said they recommended ester oil due to special lubricants for the VVEL assembly.
http://www.infinitig37.com/TSB/1SC21.pdf
Valve noise from the VVEL assembly, which Nissan also recommended ester oil to reduce or eliminate the noise. Nissan later issued an ECU update that resolved the noise issue. The noise was diminished or eliminated, but owners started reporting laggy throttle response or loss of torque.
http://www.infinitig37.com/TSB/1SB34.pdf

As for the car pulling timing, I don't know. However, the problem goes away for awhile after letting the car cool down for at least 1 minute. After several minutes of driving, it comes back. There are some days or weeks I've not seen the problem show up as well, so it's not really an everyday thing. However, it is definitely easy to lose power on a warm day (above 70 deg) after driving around for awhile.

[EDIT] WTF... I just saw the thread about 2011 models not requiring ester oil because of the ECM update. Hmm... wonder if I should test drive the 2011 Z for a day or two lol. Seriously... I might want in on this.

05-18-2011, 10:10 PM	#661 (permalink)
DIGItonium A True Z Fanatic Join Date: Jan 2009 Location: Kansas Posts: 3,800 Drives: 09 Z34-TT 6MT Rep Power: 43	It's weird... G37 owners first reported a couple of things: Poor throttle response due to the choice of motor oil, which Nissan said they recommended ester oil due to special lubricants for the VVEL assembly. http://www.infinitig37.com/TSB/1SC21.pdf Valve noise from the VVEL assembly, which Nissan also recommended ester oil to reduce or eliminate the noise. Nissan later issued an ECU update that resolved the noise issue. The noise was diminished or eliminated, but owners started reporting laggy throttle response or loss of torque. http://www.infinitig37.com/TSB/1SB34.pdf As for the car pulling timing, I don't know. However, the problem goes away for awhile after letting the car cool down for at least 1 minute. After several minutes of driving, it comes back. There are some days or weeks I've not seen the problem show up as well, so it's not really an everyday thing. However, it is definitely easy to lose power on a warm day (above 70 deg) after driving around for awhile. [EDIT] WTF... I just saw the thread about 2011 models not requiring ester oil because of the ECM update. Hmm... wonder if I should test drive the 2011 Z for a day or two lol. Seriously... I might want in on this. __________________ Last edited by DIGItonium; 05-18-2011 at 10:13 PM.