[ejkiet]

Hey guys,

I have been trying to narrow down a lean condition on my 14 BRZ.

Treadstone 6758 kit

omnilink 4 bar map sensor

deatschwerks 340lph fuel pump

turbosmart on turbo bov

vacuum line is currently tapped between the intake manifold and the booster check valve.

I currently have my post o2 sensor at the bottom of my downpipe, narrow band o2 in the middle and my wide band at the top (closest to the compressor housing)

So far I checked the mating point at the header, the v-band connection at the up pipe (which had a little bit of soot) and the vband connection at compressor housing to downpipe. Applied copper permatex to all v band connections but I'm still reading high values on my short term fuel trim which is causing my cel to kick on (now about 150 miles)

I'm currently running a base map from trust auto but the problem was consistent even with my original treadstone map.

Let me know if anyone needs any additional information, definitely open to hearing your opinions.

btw, I've already suspected the maf which iv cleaned and I have not looked further into the narrow band values yet.

Car has 20,xxx miles.