egr valve
Drifting
Joined: Dec 2009
Posts: 1,349
Likes: 34
From: Porterville Ca
Car Manufacturers don't publish how much movement is required, usually if you operate the valve, or apply vacuum and the engine stumbles, it's good. Most egr problems are that the plunger doesn't move at all due to a broken diaphram, plugged egr ports or the vacuum control system isn't working. The valve only has to dilute the fuel/air mixture to lower the combustion temps to prevent NOX emissions and prevent pinging.
