egr valve and idle 94 LS 400

[yardbuzzard]

Can a bad egr valve cause idle problems? This car runs about 1100 rpm's at idle.You can tap the egr valve a time or two and it will idle at 650 and run great till you turn it off and restart. then back to high idle.
thanks in advance.

 

[Peewee]

Remove the valve, clean it extensively with carby cleaner, let dry, reinstall.
Test.
Let me know if it works.