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.
Cold Engine
- Ensure engine coolant temperature is below 140°F (60°C). Disconnect vacuum hose to distributor advance diaphragm B. Connect a vacuum gauge to hose.
- Start engine and check for vacuum at idle. If vacuum is present, go to Warm Engine test. If no vacuum is present, check for voltage at vacuum control solenoid valve in emission control box 4P connector Blue/Black wire.
- If there is voltage, replace vacuum control solenoid and retest. If there is no voltage, go to Trouble Shooting.