How do you exactly tune a yaris? - Toyota Yaris Forums

HenryMak16 · 09-06-2014, 01:27 PM

Was learning about air-to-fuel ratios and gave a local tuning shop a call. They said they don't have any software to get into the yaris' computer. Saying I need something aftermarket?

On another note, will tuning the AFR to stoich (14.7) on a bone-stock yaris benefit?

mitchell12 · 09-06-2014, 01:37 PM

Don't think any Toyota ECM's have really been cracked or the code released for them meaning they can't be reprogrammed. So yes, in order to tune you will need something aftermarket and unless you have a handful of boltons there isn't much point in a tune.

xnamerxx · 09-06-2014, 01:42 PM

The ecu can't be tuned since it
Hasn't been cracked but you can add a piggyback. There isn't much to gain from optimizing AF tables but optimizing cam timing is worth quite a bit of HP. The stock engine gains about 10 HP with a camcom.

malibuguy · 09-06-2014, 02:42 PM

I thought the camcon was discontinued. ..?

09-06-2014, 01:27 PM	#1
HenryMak16 Drives: 2009 Toyota Yaris Hatchback Join Date: Aug 2014 Location: Southern California Posts: 6	How do you exactly tune a yaris? Was learning about air-to-fuel ratios and gave a local tuning shop a call. They said they don't have any software to get into the yaris' computer. Saying I need something aftermarket? On another note, will tuning the AFR to stoich (14.7) on a bone-stock yaris benefit?

09-06-2014, 02:42 PM	#4
malibuguy Obsessed with 1.5L Drives: '10 PW Yaris Sedan Join Date: Feb 2011 Location: Westminster, MD Posts: 907	I thought the camcon was discontinued. ..? __________________ -Greg...the Exhaust Freak. -10 PW sedan 107whp/110wtq, full exhaust, suspension bits, TRD LSD -06 Highlander 3mzfe Limited AWD -82 Malibu, 1uzfe swap -97 Tercel coupe, 1nzfe/4.31 -96 Tercel coupe, Turbo 5efe, autoX -96 Tercel 4dr

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09-06-2014, 01:37 PM	#2
mitchell12 Drives: 2007 yaris HB Join Date: May 2013 Location: St.John's, Newfoundland, Canada Posts: 55	Don't think any Toyota ECM's have really been cracked or the code released for them meaning they can't be reprogrammed. So yes, in order to tune you will need something aftermarket and unless you have a handful of boltons there isn't much point in a tune.

09-06-2014, 01:42 PM	#3
xnamerxx 0-60 in slow Drives: light blue liftback Join Date: Aug 2009 Location: so cal Posts: 926	The ecu can't be tuned since it Hasn't been cracked but you can add a piggyback. There isn't much to gain from optimizing AF tables but optimizing cam timing is worth quite a bit of HP. The stock engine gains about 10 HP with a camcom.