Search found 3 matches

by gcos
Tue Jun 09, 2015 1:14 pm
Forum: Operation
Topic: Vacuum Gauge Reading Lower than Normal
Replies: 5
Views: 8081

Hi Alex, Sorry for the delay in response! I think most of the conversion programs are using inHg as absolute pressure whereas on my gauge it is showing depression (i.e. amount that the manifold is below atmospheric pressure). The MAP reading on the MJ on the other hand reads absolute pressure. This ...
by gcos
Sun Apr 12, 2015 6:42 pm
Forum: Operation
Topic: Vacuum Gauge Reading Lower than Normal
Replies: 5
Views: 8081

Hi Alex, Thanks for your response. I just tried switching the t-piece connections around and the results were exactly the same as before. I also tried sucking through a pipe attached to the gauge to check the diaphragm and it holds vacuum well so isn't leaking. I also tried setting up the megajolt t...
by gcos
Mon Apr 06, 2015 9:30 pm
Forum: Operation
Topic: Vacuum Gauge Reading Lower than Normal
Replies: 5
Views: 8081

Vacuum Gauge Reading Lower than Normal

Hi All, I just finished fitting an MJ/E to my 1275 mini and am pleased to say that all is running beautifully. Except one thing... I'm taking the map sensor feed off of my vacuum gauge feed via a T-Piece (all plumbed into the manifold)... since fitting the megajolt, the vacuum reading on the gauge i...