Anybody know how to test if the EGR valve is properly working or the EGR valve modulator

1989-95 ENGINE PERFORMANCE
Toyota EGR Function Testing
All Models
EGR VALVE
1) Disconnect vacuum hose to EGR valve. Using a hand-held
vacuum pump, apply vacuum to EGR valve with engine at idle. Engine
should run rough or stall. If engine does not run rough or stall,
check EGR valve passages for blockage or faulty EGR valve. Clean
passages as necessary. If passages are clear, replace EGR valve.
2) Install vacuum gauge to ported vacuum port to EGR. Raise
engine RPM. Vacuum should be present. If vacuum is not present, clear
vacuum port of blockage.

Pull off the valve suck on the top and have someone look at the valve while you do it to see if the valve is still functional

Normally if it has any sort of blockage youll see it as soon as you pull it off

This post has been edited by Julian_Navia: Jun 19, 2013 - 11:47 PM

Thanks guys