I have a ZZP Mini-AFC for Sale. It sells for $149.99 on ZZP. I am selling it for $50.00. It is for 97-03 Grand Prixs and 97-05 Montes/Regals/Impala/Bonneville Cars.
From ZZP's Website:
Provides standalone management of air/fuel mixture onvehicles with frequency based MAF systems. This Mini-AFC allows adjustments to MAF(Mass Air Flow ) frequency signal (in Hz) from 1 to 255% of original frequency in 1%increments. This allows the operator to lean out or richen the Air Fuel mixture simply bychanging the digital DIP switch settings on the device. The AFC adjustment is applied to theentire MAF operation range. The AFC checks switch settings on power up and applies themimmediately. Changes to the switches will not result in a % change until the unit is powereddown and then back up again.
Thanks.
Adam