[Porsche944]

The only adjustment you have is for the idle mixture to set the CO (Carbon Monoxide) level.

To do this you need to install a jumper wire between pinn B and C of the diagnostic connector (the connector is located on the driver side fender), and connect a digital volt meter to the O2 sensor output. Connect a dwell tach to the coil, and insert a 6mm allen wrench into the bypass screw on the Air Flow Meter.

Start the engine and let it come up to temperature. Set the DVM to read the 2 volts DC scale. Adjust the AFM by-pass to give a DVM reading of about 0.60 to 0.7 volts. NOTE You may need to adjust the idle by-pass on the throttle body to maintain 840 +- 50 RPM.