Greddy Emanage Blue and Blitz Supercharger

[tmontague]

Originally Posted by Focus_Sh1ft

As with any piggyback, you'll either need to skew the AFR / O2 sensor reading during part throttle tuning or yank the AFR sensor entirely to force constant open loop fueling.

Is a piggyback not what skews the ECU? Or does a piggyback only do anything in open loop due to the ECU relearning?

[Focus_Sh1ft]

Originally Posted by KTS

Wouldn't removing the afr sensor set of the check engine light that would cause drivability issues?

It would throw a code, but won't cause any issues.

Originally Posted by tmontague

Is a piggyback not what skews the ECU? Or does a piggyback only do anything in open loop due to the ECU relearning?

If you're just adding fuel via modifying injector pulse widths, the ECU will correct the mixture back to stoich. If you "skew" the O2 sensor (manipulate the voltage to be either higher or lower), you're essentially tricking the ECU to think stoich is actually richer or leaner, depending on your needs.