October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.
Lambda Control
- Engine oil temperature should be 176° F (80° C). Engine should be idling at 700-800 RPM. Check on/off ratio. If reading is between 40-60%, system is working correctly and test is complete. If reading is below 40%, above 60% or constant 50%, adjust mixture to obtain 45-55% on/off ratio.
- If mixture cannot be adjusted to get correct ratio, check that thermo vacuum valve rated 122°F (50° C) is open. If valve is open, replace ECU. If mixture ratio stays at constant 50%, replace defective O2 sensor.