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my fuel economy is just plummeting! the last 1/4 tank got me 35 miles in stop/go city driving. this equals under 150 miles with a full tank?! the odd thing is i just measured 340 miles/tank on the highway this weekend. this is shifting under 3K rpm (for the city) too. new O2 sensors, techron fuel system treatment, cleaned all important connectors, ran ecu diag- 55. do you think my jwt ecu could be the cause of my running super rich? my stillen tips turn black in a couple of days (not sure if this normal). if so, what the heck does the jwt program do for the na anyway? removes rpm/speed limiters? i don't think it's even close to worth it if it makes my z run super rich for hp gains in the single digits. someone please enlighten me on this issue, because quite frankly i'm getting fed up maintaining my z. it's almost a full time job at this point! lol. in all honesty, the z runs very smoothly and the engine is very strong. i'm just worried about the < 150 mpg in city issue =(
mike
zxredline@yahoo.com
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