At the end you removed a spring... I take it you modified so that air inlet valve will hang open?
Thats what I did for the issues I was experiencing,
I never had a problem until a few years ago with the new vented caps.On another forum a guy speculated that a few years ago EPA required stronger springs. I dont know if thats true but what I found is that the new vented caps do not vent properly for my truck
Some suggest drilling a hole in the cap. Im not making any recommendations
DADS50, I have the original GM optional item that has a lock. I put it up in a clear box on the bookshelf, where are the springs on my new locking cap?
If you have an original nos cap you should probably use it. I believe the NOS caps work. If I had one I would use it.
The cap In that video is from autozone part CST 6023
