BOOSTED AND PASSING OBD2 INSPECTION? - Toyota Yaris Forums

pimp my yaris · 05-23-2013, 12:12 AM

Well I finally passed my emissions test yesterday. I had to have a new cat. Converter installed to clear my p0420 code. 140$. Today I reinstalled my wideband and hooked the turbo back up. I left the factory o2 sensors attached to see if I could keep the light off with the turbo working at 12-13 psi. Before all this crap started I was running 13-1 afr with the factory o2 sensors disconnected at a steady cruise and it would richen up to 11 to 11.5 to 1 afr when at full throttle.
Now with the factory fuel trim working Im at 14-1 afr at all times except for full throttle where Im still in the 11-1 range.
This does wory me when at partial throttle and in the boost being so lean. I am not sure how this will work out in the long run. But honestly the car never ran better. It feels just like a factory turbo car. Runs perfectly, just like stock only much more power. The check engine light is off. I checked long term fuel trim and its at -18%. So the factory computer is certainly leaning out my tune from the FIC. Except at full throttle.
On a side note with the FIC hooked up previously I was never able to go over 5700rpm. I thought their was a problem with my FIC. Now with the o2 sensors hooked up. I am reaching the full 6300 redline with no problems.

05-23-2013, 12:12 AM	#31
pimp my yaris C'est la vie Drives: 2009 2 door hatchback Join Date: Aug 2009 Location: chicago Posts: 482	Well I finally passed my emissions test yesterday. I had to have a new cat. Converter installed to clear my p0420 code. 140$. Today I reinstalled my wideband and hooked the turbo back up. I left the factory o2 sensors attached to see if I could keep the light off with the turbo working at 12-13 psi. Before all this crap started I was running 13-1 afr with the factory o2 sensors disconnected at a steady cruise and it would richen up to 11 to 11.5 to 1 afr when at full throttle. Now with the factory fuel trim working Im at 14-1 afr at all times except for full throttle where Im still in the 11-1 range. This does wory me when at partial throttle and in the boost being so lean. I am not sure how this will work out in the long run. But honestly the car never ran better. It feels just like a factory turbo car. Runs perfectly, just like stock only much more power. The check engine light is off. I checked long term fuel trim and its at -18%. So the factory computer is certainly leaning out my tune from the FIC. Except at full throttle. On a side note with the FIC hooked up previously I was never able to go over 5700rpm. I thought their was a problem with my FIC. Now with the o2 sensors hooked up. I am reaching the full 6300 redline with no problems.