Take it to the dealer and have them read the IATs. If you have to, make them get another Z warmed up equally to yours and compare the two. Definitely something screwy going on with yours.
I'm with you on the OBDII reader. If it works on several other vehicles and appears to be accurate, I think you can safely say something on the Z is the culprit.
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2011 370Z 6MT Sport Gun Metallic | ARC | CJM | Ecutek | FI | Fujimura | R2C | SPL | Stillen | TWM | Z1 | ZSpeed |
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