Dastek Unichip Version Q - Toyota Yaris Forums

CTScott · 12-07-2013, 06:47 AM

Not all vehicle manufacturers are as aggressive as Toyota with maintaining the AFR. With my supercharged Yaris, even after installing an AEM F/IC, I was noticing that my AFRs under boost would go more and more lean over time (weeks of driving). It was not until I adjusted the AFR sensor input to the ECM that I was able to maintain the desired enrichment under boost.

When one of these devices gets installed it can function perfectly to the user for a period of time, but unless the user monitors the AFR of the vehicle they will likely not notice the ECM gradually pulling fuel back away.

12-07-2013, 06:47 AM	#14
CTScott ULTIMATE View User's Garage Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008 Location: USA, CT Posts: 13,460	Not all vehicle manufacturers are as aggressive as Toyota with maintaining the AFR. With my supercharged Yaris, even after installing an AEM F/IC, I was noticing that my AFRs under boost would go more and more lean over time (weeks of driving). It was not until I adjusted the AFR sensor input to the ECM that I was able to maintain the desired enrichment under boost. When one of these devices gets installed it can function perfectly to the user for a period of time, but unless the user monitors the AFR of the vehicle they will likely not notice the ECM gradually pulling fuel back away. __________________

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