Is that the piece on the main line right before the booster?
Can you remove that from the main line and replace it?
I definitely have good brakes above 1000 rpm. What's odd is I was out today and for a long time, at any speed, everything was normal. Like the problem just went away. But not for long though.

Do you know what that broken piece is I that I mentioned in my last post?

I have a magnehelic gauge at work but didn't think to bring it home. Maybe I'll go by tomorrow and get it.

Danny