02-23-2017, 03:17 PM
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#10 (permalink)
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Track Member
Join Date: Mar 2016
Location: San jose
Posts: 855
Drives: 2013 370z sport
Rep Power: 3386
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Quote:
Originally Posted by nis350
I don't have a scanner. It is my wife's DD and the ping started around 60k miles under condition described on the first post. It occurs intermittently and can't be reproduce at will (unfortunately).
Carbon build up was my first guess. We ran through many different kind of fuel cleaners but didn't really help much. However, it may not be the cause since it doesn't occur under load.
As for exhaust leaks, should be noticeable at idle during the cold start? Engine idles smooth and quiet under all condition.
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Usually if it pings it tends to be part throttle load right at tip in for most cars and will go away as soon as the load is less and ign correction occurs. I see you live in socal so you are warmer climate and 91 octane. I have been told the z is actually designed for 93 octane and they do have a constant ign correction with 91. I never heard any ping with mine in oem tune but you live right by one of the best tuners, may consider going to him (Seb) for a custom tune as they actually take out some of the ign advance for 91, if it really bugs you. Otherwise it is most likely doing as designed, going to the limit and then backing off when it detects knock. It's hard to say without being there and hearing it.
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