wideband says car is running 17+ AFR all the time, Power FC

[Grip]

i come from the subaru community for Power FC help, the Power FC isnt a popular tuning option among the subaru guys, so there isnt much help for guys like me over there..hopefully i can get some help here.

thanks for looking...



setup:
V3 STi EJ20
TD05-16G (running wastegate boost only, 9lbs)
STi 550cc injector's
Perrin up-pipe
Perrin 3" catless downpipe (divorced gate)
JIC 3" Ti catback (resonated)
CX-R FMIC
HKS EJ20G intake elbow, MAF adapter with velocity stack
ARC atmospheric BOV
ported and polished throttle body
gasket matched intake manifold runner's
Apex'i Power-FC and Commander
PLX M-300 wideband



with the wideband installed, on the stock Z4 ECU, with the above setup....the wideband says the car is running lean 17+AFR's.

with the wideband installed, on the Power FC, with the above setup, and the adjustments made for the 550cc injectors vs. the stock 440cc injectors (80%IDC, +.03ms) ...the wideband says the car is running lean 17+ AFR's.

heres what info i have about the stock injectors vs. the STi 550cc yellow top/sidefeed's.

440cc= .69ms
550cc= .76ms

heres what i have done in the PFC:

for injector correction in the Power FC:

440/550= .8 aka 80%...so i change the injector setting in the PFC commander to 80% for cylinders 1-4

for injector latency:

(550cc latency minus 440cc latency)
.76-.69= .07

the Power FC only allows latency adjustment's in .2 (or even #'d) increments...so instead of .07...i made it .06



what am i doing wrong?

why is does my wideband AFR stay LEAN? (17+ AFR)

how do i correct this issue?

[Grip]

28 views since yesterday and nobody has any tips, or advice?

[PVD04]

Well, it may be that your wideband is reading incorrectly. This could be due to an issue with the O2 sensor, the controller, or an exhaust leak. If it is reading correctly then the obvious solution would be to add fuel.

[Grip]

ive talked to two local tuner's and tech support at PLX devices...everyone agrees that the controller/display is mis-calibrated from the factory...it is being sent back for repair's and a new sensor.

i have used the power FC to add fuel...i add'd fuel until the car stumbled and choked on fuel...wideband still shows lean....even if you lean the car out with the power FC..it shows lean.

hopefully i wont have anymore issues with PLX devices.

[EvoVIII808]

yeah my AEM just took a dive on me. shows 14.8 regardless of what im doing. Sucks now that i have to get a new one.

[Yorl8]

I had some problems with my AEM, but it turned to be an exhaust leak.