I posted this in the 5.0 section but no luck with an answer yet. Thought i would stick it in here and see what happens.

I bought an idle control valve off of ebay and it came with a metal spacer that has 2 what look to be set screws in it and a little glass lens. I left it off since there wasn't one on there when i took the old one off and i didn't want to put something on my car that i didn't know what it was for or how to adjust it.

Any help with finding out what this is and how to use it would be great.

 

Best of my knowledgeyou dont have to adjust anything on a Idle control valve, Youre onboard computer on youre car should do it automaticly.

Good Luck.