my mechanic said probaly the pop charger is gettin the hot air and is not good. and probaly burning more fuel or something in those two ranges

 

Post number 4 in this link tells you how to do a reset.
http://my350z.com/forum/engine-and-d...ecu-reset.html

 

hell i had the pop charger on my car and drove around a lot in 90º+ temps everyday in florida ... i noticed a little lag on the HP for the car due to heat soak but IMO it never affected my car what so ever with gas milage.. now i have a polished furookie intake on my car now and i love the way it sounds and im always hitting WOT and yes the gas goes down FAST !!! in normal driving with no heat shield on the intake im still hitting 300+ miles a tank ... im sure others will tell you heat soak will affect your gas milage but IMO it doesn't affect anything !! just lay the foot off the pedal

 

I did the ecu reset and I have to say it worked! I only put in 7 gallons when I was on empty just to test it and I have gone 92 miles and I am still above a quarter tank. Thanks for all the help

 

I highly recommend doing an ECU reset in the fall and then in the middle of spring.... This will help with performance and fuel Mileage, all cars adapt to t he quality of fuels, so being that you are getting less economy is because our ECU's are still tuned to summerblend, and when it doesnt get it, it compensates for more fuels.... and vice versa!