In a message dated 10/17/2007 7:00:30 AM Central Daylight Time,
KingR44916@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
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