Boost gauge rattle?

[Fez boy]

Why is my boost gauge vibrating

I was told it's because the air from a turbocharger comes out in high frequency and it's the air pulses that can cause the gauge to rattle

If I engage the clutch pedal the vibration stops

I am thinking of going electric

Mk4 ibiza TDi

 

[stoneyfordNI]

do u mean the needle flucuates(blatant typo) or the gauge itself

 

[Sisson]

My used to buzz and rattle when on boost, it pissed me off loads so i just removed the gauge...

I got told it could have been down to cheap boost tubing used???

 

[cordobabrendy]

cheap gauges flicker and fluctuate, quality ones are dampered.

 

[Fez boy]

Yes it's the needle

Looks like a new gauge then

 

[gazjones]

sisson that was the gauge a bought off you wasnt it
mine is really quiet and smooth i konw the t peice on mine has a very small hole and the tap off so not to much air gets to the gauge this could be to stop the needle rattling just an idea

 

[Sisson]

Gaz, yeah that was the one...

Mine was drilled and tapped into the intercooler boost pipes, so that might explain it, due to the vibrations from the derv lump.

 

[gazjones]

yes it could be that and tapping into a boost pipe is going to send serious amounts of air right to the gauge its probably showing what the condition is like inside the pipes
restricting it might help against the vibrations

 

[Fez boy]

All sorted now

I have added a small washer jet into the pipe(smaller hole for air to get through)

It's all nice and quiet now!