1995 240sx CEL 76 & 105

[l80_240]

i was driving my car when the CEL came on, i pulled the codes, its 76 and 105, tried resetting them but they come right back on as if i did nothing, i checked the egr stuff but i dont really care about the egr its the code 76 Fuel Injection System that bothers me, i checked that the pump voltage and its fine and pumps, lines fine, its got a new(less than 50miles) z32 filter, injectors fire and have good voltage its got me stumped, it drives just fine like nothings wrong, im getting about 19MPG K&n panel filter, ngk plugs and wires, custom cat-back. hope someone can help