WTF DC Header problem - Page 2 - Toyota Yaris Forums

cali yaris · 02-25-2012, 03:21 PM

The anti-fouler goes on the SECOND O2 sensor, on the midpipe, NEVER on the first air/fuel sensor on the header.

And, if you didn't before, disconnect the battery for 10 minutes to force ECU re-learn. You'll get more out of your new header if you do.

47_MasoN_47 · 02-27-2012, 10:26 AM

Thanks for the tip Garm! Would it work the same if I just unplugged the ECU itself so that my radio doesn't go all stupid and lose its settings, or do I need to disconnect the battery from everything?

pennyracer, I can already tell some improvement, most noticeably on the low end. The torque feels better and the acceleration is smoother. I also have a HK axle-back, NST 10% underdrive pulley, and AFE short ram intake. With the combination of the other 3 mods I had a weird slowness during accel until the car got to about 1500ish RPM, after which it would launch proper. Not sure why that was the case, but with this header it's a much smoother acceleration.

47_MasoN_47 · 02-27-2012, 10:29 AM

Also I see you mention getting it tuned in other threads. What exactly does this entail?

cali yaris · 02-27-2012, 11:24 AM

I would disconnect the battery. Best not to fool with your ECU.

Break a pin = dead car

Tuning involved wiring in a management system and tuning on a dyno with someone who knows what they are doing.

47_MasoN_47 · 02-27-2012, 11:47 AM

Sounds expensive. Is it worth it?

02-25-2012, 03:21 PM	#19
cali yaris ULTIMATE View User's Garage Drives: 07 Yaris Turbo Join Date: May 2007 Location: Canoga Park, CA Posts: 14,859	The anti-fouler goes on the SECOND O2 sensor, on the midpipe, NEVER on the first air/fuel sensor on the header. And, if you didn't before, disconnect the battery for 10 minutes to force ECU re-learn. You'll get more out of your new header if you do. __________________ Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific.

02-27-2012, 10:26 AM	#20
47_MasoN_47 What I thought I'd do was View User's Garage Drives: 09 Yaris Sedan Join Date: Aug 2009 Location: Northwest Alabama Posts: 1,140	Thanks for the tip Garm! Would it work the same if I just unplugged the ECU itself so that my radio doesn't go all stupid and lose its settings, or do I need to disconnect the battery from everything? pennyracer, I can already tell some improvement, most noticeably on the low end. The torque feels better and the acceleration is smoother. I also have a HK axle-back, NST 10% underdrive pulley, and AFE short ram intake. With the combination of the other 3 mods I had a weird slowness during accel until the car got to about 1500ish RPM, after which it would launch proper. Not sure why that was the case, but with this header it's a much smoother acceleration. __________________ My Nissan Hardbody (D21) 4x4 build log Check out my YouTube channel (mostly shooting) - http://www.youtube.com/user/47MasoN47

02-27-2012, 10:29 AM	#21
47_MasoN_47 What I thought I'd do was View User's Garage Drives: 09 Yaris Sedan Join Date: Aug 2009 Location: Northwest Alabama Posts: 1,140	Also I see you mention getting it tuned in other threads. What exactly does this entail? __________________ My Nissan Hardbody (D21) 4x4 build log Check out my YouTube channel (mostly shooting) - http://www.youtube.com/user/47MasoN47

02-27-2012, 11:24 AM	#22
cali yaris ULTIMATE View User's Garage Drives: 07 Yaris Turbo Join Date: May 2007 Location: Canoga Park, CA Posts: 14,859	I would disconnect the battery. Best not to fool with your ECU. Break a pin = dead car Tuning involved wiring in a management system and tuning on a dyno with someone who knows what they are doing. __________________ Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific.

02-27-2012, 11:47 AM	#23
47_MasoN_47 What I thought I'd do was View User's Garage Drives: 09 Yaris Sedan Join Date: Aug 2009 Location: Northwest Alabama Posts: 1,140	Sounds expensive. Is it worth it? __________________ My Nissan Hardbody (D21) 4x4 build log Check out my YouTube channel (mostly shooting) - http://www.youtube.com/user/47MasoN47

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