1, Remove air cleaner.
2. Detach upper vacuum hose at EGR valve.
3. Connect upper vacuum hose of 1st stage with an approx. 1 meter (3 feet) long hose.
4, Start engine and let it run at idle speed.
5. Detach vacuum hose at distributor and connect it to hose using an appropriate piece of tubing. Also check whether valve stem can be moved up.
Repeat this check several times by detaching and attaching hose.
A mirror must be used to see valve stem's movement.
26 - 22 Removing and Installing EGR Valve Checking EGR Valve
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