[TR] egr valve

[Dave1massey at cs.com]

In a message dated 10/17/2007 7:00:30 AM Central Daylight Time, 
KingR44916 at aol.com writes: 
> i have a 76 tr6 how do i know if the egr valve is working and can it be 
> debuilt
> 
You can check movement of the diaghram by feeling the underside of the 
diaghram with your fingers and momentarily revving the engine.  The vacuum is ported 
and there is no vacuum applied with the throttle closed but as you open the 
throttle vacuum will be applied to the diaghram and it will move upward.

Another check is to apply vacuum from a constant source (the vacuum retard 
line for example) to the EGR valve.  The diagram will move and open the valve.  
If the passages are not blocked the engine should start to stumble as the 
exhaust gas is introduced into the idle mixture.

Dave