Originally Posted by sallan
1993 SSEI Mine sits at -50 at idle!!!! This sounds bad, lol!!!! What could be the cause
You have a metric gauge that reads kPa instead? *shrugs*
**EDIT** Went and checked my boost gauge, which is metric from Canada. Sounds like yours is also from Canada, with a metric gauge that reads in kPa instead of psi.
The bottom of the negative side should read -70, in whch case -50 is perfectly normal. Mine hovers around that at idle as well.