How To Read The Vacuum Gauge ??

mazdaspeed · July 9, 2007

Hi Guys,

I would like to get some information on how the vacuum gauge meters works. I got the basics figured out but I recently installed a meter and would like to know if it was installed the way it was supposed to be.

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The meter reads 0 to 30 from right to left like so – when the engine is switched off the reading is at 0.

However when the engine is in idle mode the meter reads 25 and when I rev/ start driving it th the needle moves to 10 or sometimes 5 mark.

Is this correct or is there an issue in my vacuum etc…

Would some 1 please be kind enough to elaborate a bit more on this topic….Thanks in advance

Edited July 9, 2007 by mazdaspeed

Zakie@TIC · July 9, 2007

Thats fine, ideally it should go to zero on WOT (atmosphere) and approx. 40 immediately on off throttle, before its settles at idle.

Edited July 9, 2007 by Zakie@TIC

neXGen · July 10, 2007

Hey Mazda.. i remember DevZ posting a link in a thread which Hola opened dude.. that link contains installation info plus info on how you could troubleshoot engine problems via the vacuum gauge.. ll try to post the link once i find it ..

Zz