EGR Valve test

[88olds32]

What's the easiest way to check an EGR valve to ensure it is functioning properly? It's on an 1988 Olds 307 engine.

 

[Clone TIE Pilot]

Use a Mityvac to ensure it is not leaking vacuum. Then manually depress the valve to feel for smooth movement. If it needs replacing, get a AC Delco valve.

 

[88olds32]

Thanks. I disconnected the vacuum hose that links the EGR valve to what I believe is the EGR control solenoid - it's relatively near the distributor cap. I left the hose on the EGR valve intact and attached the other end of the hose to the Mityvac gun. I pumped it multiple times, but the gauge needle wouldn't move. Would this mean that the EGR valve is stuck or no longer functioning? Should I do the vacuum test with the car on? The engine starts, and runs, but when revving, it bogs and wants to turn off. I had this issue two years ago, and the issue (according to the dealer) was the EGR valve. I had them replace it, and now it seems to be doing the same thing again. I don't really drive the car much, and am puzzled as to why the EGR valve has once again failed.

 

[88hurstolds]

If they didn't use an AC Delco part then Im not surprised that it failed.
You get what you pay for...
Buy a Delphi one on Rockauto and swap it out yourself and be done....