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I just put in a 37820-p2n-A22 ecu from 97 hx m/t in my 96 hx. My hx is a california version
It just past smog a few weeks ago and I was surprized because I thought the nox from leanburn would show up too high but it was okay.California hx cars do have leanburn its just very very slight. My best trip avg was about 38mpg with the 37820-p2n-A21. So I was about to put in the new ecu when I realized the one in my car WAS a Federal ecu! How could I be getting such bad milage in a HX with fed ecu, and for that matter how did I pass California Smog Test? then it dawned on me that some one must have reprogrammed it, it drives fast and vtec is very easy to get into. I now have installed my new p2n a22 and its great! I took a 90 mile trip today and only used two gallons of gas= 45mpg. Cant wait to buy mpguino to fine tune my driving habits.
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