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.

Constant Vacuum Control (CVC)

Start engine. Verify manifold vacuum exists at CVC valve, located inside control box on firewall. Disconnect CVC vacuum hose at EGR control solenoid. Connect vacuum gauge. If vacuum is not about 8 in. Hg, replace CVC valve.