#10472, "RE: Need Help understanding A/F mixture, and what is acceptible" In response to In response to 4
If you don't have a wideband o2 sensor, don't tune with the Air Fuel ratio. The stock sensor is not nearly accurate enough to be used to properly tune the car.
1st gens should have the o2s around .92, and 2Gs should be slightly higher at around .96. (conservatively tuned). But again, tune using timing advance and knock.