I had an Autometer boost gauge fitted by a main dealer recently and was initially happy with it even though it "whistled" slightly ( and apart from them wiring up the lights incorrectly, meaning my fog lights were permanently on!).
However, thinking about it there shouldn't be any noise from the gauge, or at least not continuous noise while on-boost unless there's a leak at the back of the gauge. Max boost reads as about 13 - 14 psi, which as far as I know is normal.
I haven't listened to another boost gauge so I don't know if it should make a noise at all. Is this normal?

Had my boost gauge installed a week ago (not sure what the make is) and it's completely silent.

Rich.

There's a pipe that goes to the back of these things that sounds like it's loose. Get to the back of the gauge, and you'll see a brass connector with plastic pipe coming out of it.

Slacken off the nut and make sure that the end of the pipe is flat, and that there's an olive (small donut shaped thing) around the pipe before the nut. If all's well, just tighten it - I used a pair of pliers.

If the olive is missing, you need it - it's what makes the seal.

Nick.

A "whistling" sound would indicate a leak. My gauge initially made a buzzing sound but this was the needle vibrating due to the pulses in the inlet manifold, I had to fit a small clamp to the pipe and adjust until the needle remained steady but still reacted rapidly to vacuum changes.
JohnD

Yip, Simon u have wots known as a leak my good man http://bbs.scoobynet.co.uk/biggrin.gif
I replaced my old gauge with an autometer 1 recently. The old hose inside diameter was larger than the outside diameter of the autometer stuff http://bbs.scoobynet.co.uk/frown.gif so I cut a short length of the autometer stuff and slid it into the old hose (still connected to manifold) then did a run of hot glue around the end of the old pipe to seal them. Upon connection no leaks http://bbs.scoobynet.co.uk/wink.gif If u r problems with the connector as chiark said try tightning the connector with pliers. In the event this doesnt work use good old PTFE tape (plumbers tape) on the connector. It`s because of the tapered thread http://bbs.scoobynet.co.uk/wink.gif

Have phun

Pete

Cheers folks
Bit of investigation revealed the brass nut on the back was only done up finger tight...
Got a small bicycle spanner that fitted perfectly and viola! no more whistling. Hoorah!
I'm so un-technically minded it scares me...

Thanks again gents http://bbs.scoobynet.co.uk/smile.gif

PS. they eventually sorted out the lighting for it too http://bbs.scoobynet.co.uk/rolleyes.gif