Androidmj

when i shut my boost controller off, i get a solid 8 boost. Both my autometer gauge and my profec b show 8psi. Also, my car sometimes idles at 17-18in vacuum, and other times (especially after a hard run) idles at 14. Anyone know why this would be, or where would be the best place to search for a vacuum leak, i already pulled my UIM yesterday to check for loose hoses, or broken check valves, but didn't find anything.
Thanks

edit...also, i get great boost, boost it to 13 sometimes, and runs great then too, its just the idle and the 8psi i get when the controller is off thats bothering me

poss

iTrader: (5)

Sounds normal to me.

When your boost controller is off, you are running at the wastegate actuator spring pressure (happens to be around 7-8 psi)


After a hard run, your fans are probably on, creating a significant enough load to bring your vacuum readings down.