[go_fast_sti]

Hey Guys,

First I'd like to thank all of you for this great website and information provided in it. Been a long time reader before joining. Anyways having some trouble with my 06 STI (07 STI in USA) here in New Zealand. The car has been tuned 6-8 months ago using enginuity by my tuner. Mods as below. We get 95/98 RON petrol here. Boost was a problem with spiking initially, which was fixed recently with a cat and retuning the boost/wgdc by myself. Nonetheless been plagued by a CEL 0171 recurrently since it was initially tuned. Have gone through recommendations on this site and NASIOC trying to troubleshoot it but vac lines/02/MAF seem ok. I noted that the light was coming on at cruise mainly. Did some quick logs which show A/F at 20 at light throttle/engine load, but 11.1 at WOT. I think the mid/high load map is right but dont know what to do about this. ? MAF scale issue, ?? injector scale issue. Please help. Unfortunately cant figure out how to post a log. Cheers


Mods:
APS CAI 65mm
APS Turbo Inlet
APS TMIC
APS 3" TBE with hi-flow cat
Blouch TD06-18G
750cc injectors, SARD FPR, Walbro 255

[BenW]

post up your injector scalar and latency. also, you should be able to get away with a stock MAF table for the APS 65, but it will need to be scaled as well.

it would be easier to scale the intake and injectors separate, but you would need to have a stock intake or injectors installed for that.

[ray@turbotek]

Originally Posted by go_fast_sti

Hey Guys,

First I'd like to thank all of you for this great website and information provided in it. Been a long time reader before joining. Anyways having some trouble with my 06 STI (07 STI in USA) here in New Zealand. The car has been tuned 6-8 months ago using enginuity by my tuner. Mods as below. We get 95/98 RON petrol here. Boost was a problem with spiking initially, which was fixed recently with a cat and retuning the boost/wgdc by myself. Nonetheless been plagued by a CEL 0171 recurrently since it was initially tuned. Have gone through recommendations on this site and NASIOC trying to troubleshoot it but vac lines/02/MAF seem ok. I noted that the light was coming on at cruise mainly. Did some quick logs which show A/F at 20 at light throttle/engine load, but 11.1 at WOT. I think the mid/high load map is right but dont know what to do about this. ? MAF scale issue, ?? injector scale issue. Please help. Unfortunately cant figure out how to post a log. Cheers


Mods:
APS CAI 65mm
APS Turbo Inlet
APS TMIC
APS 3" TBE with hi-flow cat
Blouch TD06-18G
750cc injectors, SARD FPR, Walbro 255

sounds like injector scaling

[BenW]

if the mid and high AFRs are dead-on with the map AFR, it's probably a latency or MAF scaling issue.