OK. My boost gauge was installed (by someone else) and it didnt work. I have now replaced it and wired it up myslef. It works. But! I say but! Having been plumbed by the SAID expert, the gauge goes down instead of up. Being it is tapped into the vacuum line. Is this correct? It reads between 15-18 wich is about right. When I rev the engine the pressure drops to 15.
What is with that?
I am confused!
NOTE: It is a RaceTech gauge. Electronic type with the sensor under the bonnet.
What engine is it on?
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I have never seen a boost gauge tapped into a vacuum line. mine is just above the inlet manifold
Last edited by Ben-e-boy; 26th September 2011 at 04:56 AM. Reason: shouldnt drink and answer
96 GQ coil/Cab
08 G6eT
ZD30 Engine...the grenading model.
There is no vacuum line you can tap into on a ZD30 to get a boost reading, you need to get a fitting welded or brazed onto the intercooler outlet pipe.
Tony
G-ForceCrew (30th December 2011), the godfather (26th September 2011)
15 PSI is atmospheric pressure (well 14.7 nominal) so I am with Tony in that it's maybe not plumbed correctly.
If the sensor is in any small dia rubber tubing on a ZD30 then it sure isn't measuring boost. The ECU boost sensor is on the Intercooler and most people opt to plumb into the Intercooler outlet pipe for aftermarket gauges
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the godfather (26th September 2011)
Thanks guys. I will weld a socket in and get it sorted.
I guess that will teach me for getting so,meone else to do what I should have done myself the 1st time eh.
We've all suffered from that once or twice mate........... Never a good thing when you part with your hard earned for the privilege.
Post up some pics of your mods when you get them sorted mate.
whats wrong with drilling and tapping a fitting in guys
96 GQ coil/Cab
08 G6eT
I will be looking at tapping a thread 1st. Will depend on how thick the wall is.
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