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AFR + Fuel Tuning


AFR+ FREQUENTLY ASKED QUESTIONS

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The following is only generic frequently asked questions. Browse the product section to your particular vehicle to check if advanced troubleshooting information is available.
  1. What does the AFR+ do in the case of O2 sensor failure?

  2. Your instructions say to connect the wideband to both the Power and Ground of the battery. Will this be consuming power when the ignition is off?



 

What does the AFR+ do in the case of O2 sensor failure?

It is an inevitable truth your O2 sensor will eventually go bad. The AFR+ has a built in back-up program just like your stock ECU has a set open loop map in case the narrowband sensor fails and the vehicle needs to get out of closed loop mode. Each closed zone has a defined fuel value to jump to in the case of error readings coming from the Bosch O2 sensor. Most of the AFR+ units will default to the values used in Dobeck GEN 3.5 applications. Advanced users have the ability to adjust these values through computer programming.
 

Your instructions say to connect the wideband controller to both the Power and Ground of the battery. Will this be consuming power and draining my battery when the ignition is off?

The AFR+ does not consume any power when the vehicle is off. Our wideband controller has a relay switch built into the unit. Take note on one of the injector connectors coming from the wideband there is a double pinned RED wire. This connection is grabbing power from the stock system. This power source is a 12 volt switched power which is running the injector when the igntion is turned on. Once the ignition is turned on, the relay switches on and powers up the AFR+. The power connection to the battery is necessary to help provide a direct power source for the Bosch O2 Sensor.




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