limaynard
Active Member
Hi, I am going through the process of making a few upgrades to my Airtrek and I was wondering what the range of vacuum pressures were at idle.
Mine has been at around 12 InHG (-6 PSI) since I fitted the boost gauge many years ago but having recently fitted the Evo metal BPV I want to make sure that is correct as the BPV needs vacuum to operate.
I am told that the Evos are at around 18 InHG (-9 PSI) so I was concerned that I may have a vacuum leak and that the BPV may not open early enough causing a boost spike - actually since fitting the TD04HL-19T I am experiencing a spike of auto gear change...
Thanks...
Mine has been at around 12 InHG (-6 PSI) since I fitted the boost gauge many years ago but having recently fitted the Evo metal BPV I want to make sure that is correct as the BPV needs vacuum to operate.
I am told that the Evos are at around 18 InHG (-9 PSI) so I was concerned that I may have a vacuum leak and that the BPV may not open early enough causing a boost spike - actually since fitting the TD04HL-19T I am experiencing a spike of auto gear change...
Thanks...