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 59°F (15°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, replace thermovalve B and retest.