95 240sx Engine Check Light

[zenkii]

Ok before anyone start bashing the "search" button, i've already been there and done that on few websites regarding information about 240sx. So now i need help with my engine check light , diagnosed it and recieved at "code 15", i've check chilton and nico for this particular code, but it appears to not exist. Though i came across Orion's site (http://www.ka24development.com/ecu_codes.html), he's a reputable member of freshalloy and Ka-t.org, his site said code 15 is "15 - Mixture ratio is too lean despite feedback control; fuel injector clogged" A mechanic and I checked these problems and said these things aren't effecting the injectors. Also i got a "code 55" mean "Normal engine management system operation is indicated – this means all is OK." I know this is a long post, but someone care to offer some help?This is a stock 95 240sx and drives normal, but get horrible gast milage(18-20 city+HW)

[[s13!]]

try checking and cleaning out your fuel system..

prolly just a clogged fuel filter