sr20det idles rich, help please!

[mt05]

hey everyone, first i'll tell u a bit about my set up. blacktop sr20det, pretty much stock except a few bolt ons. upgraded fuel pump. So just recently i would start my car and it would run rich at idle...around 11 or 12 on my afr. when i would rev it up it would lean out. once i would start to drive it would lean out during boost so i stopped boosting until i can solve this problem. i do have 550cc injectors, z32 maf and a tuned ecu but once i put these in the exact same problem happened except it ran a bit richer at idle ( around 10 .2 ) and rich under boost 10.6. so i put everything that is stock back in to make it a bit easier to solve this problem. my injectors aren't leaking either, i checked that...timing isn't off...02 sensor was replaced...and my wideband is reading correct, i can see the fuel spray out of the exhaust when i rev it up. my ecu showed a code for 34, and i replaced hte knock sensor.the code is no longer there but now code 55 showed up...i'm completely stumped! any ideas would be greatly appreciated, thanks!

[240sx89speed]

check your oxygen and your fuel sensor

[whoflungpoo]

check your oxygen and your fuel sensor

Fuel sensor?

I'm having similar problems, so I'm anxious to see how this gets resolved.

[240sx89speed]

i only said fuel sensor like thatgeneraly its your oxygen sensor that you might forgot to connectbut in case check all you sensorand your vaccumjust in case

but im pretty sure its the oxy sensor