EGR vacuum modulator.

TbirdSCFan

Registered User
Does anyone know how to check for proper operation of the egr vacuum modulator gizmo that's attached to the firewall bracket next to all the relays?

I'm not sure if mine works or not and I'm getting a code 31. It appears that some circuit open/closes some sort of port that causes the vacuum line going to the EGR to have a varying pressure.
 
this may seem strange one way to tell if your egr is working ,un plug vac hoseor just put a piece or vac hose on egr and suck in if hard or nothing happens.egr is bad sounds silly ,but it works.
 
this may seem strange one way to tell if your egr is working ,un plug vac hoseor just put a piece or vac hose on egr and suck in if hard or nothing happens.egr is bad sounds silly ,but it works.
Yup. I know just what you're talking about.. feeds into the top of the EGR.. I've been known to use that type of vaccum test before. :D
 
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