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Egr q


Racenut

Well-Known Member
Joined
Jan 1, 2013
Messages
51
Vehicle Year
1987
Transmission
Manual
Is the egr normaly open or closed? When the motor is off , and there is no vacum.is it open or closed? And when does it use the egr?
 
When there is no vacuum, the EGR is closed. It opens when vacuum is applied . . but that depends on what engine and control system it has. When engines were carburetted, vacuum only determined when they were to open. But if a computer is involved, they determine when the vacuum signal is sent to the EGR.
 
Sorry. Its an 87 b2 with a 2.9
 
Your EEC IV computer is definitely controlling when the EGR is open and when it is not. That is assuming that all the pieces to the system are functioning correctly.
 

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