6speed4.7
Senior Member
Thanks Rick, I think I’m getting the ideaYou can make one by using a cheap vaccumn gauge,plumb it in behind the filter.Then you just read the inches of vaccumn it pulls.You can buy a dedicated version,but a cheap vaccumn gauge bought from Princess Auto accomplishes the same basic thing
But just to be certain-
We’re trying to get a vacuum reading in the mid-pipe between the filter and throttle body, the higher the reading the more restriction in the filter?