Faulty boost gauge?

[JimX]

I think my aftermarket Autometer boost gauge is faulty. When the engine is off, it seems to sit at a random position between 0 and 3 psi, and at idle it is between -20 and -13 or so (varying over long periods of time for no apparent reason, but doesn't jump up and down constantly).

However it always seems to sit on the maximum boost I have preset on the EBC when the turbo is at maximum boost. I believe that both these devices get the actual boost pressure from 2 different parts of the engine, so I don't think the EBC is fluctuating in a similar fashion. The readings on the EBC are always consistent.

Does anyone know what might be the inconsistent Autometer gauge readings? Is it just a faulty gauge, or could there be something wrong with the line? Why is it only seemingly inaccurate when not at full boost?

[R31 POWER]

My Sport Comp Autometer boost gauge needle sits between 0 and 1psi when off.

The gauge was off my cousins VL turbo and he had a wolf 3D wich tells you boost on the hand peice,both shown the same boost so I guess thats the same as yours.

[Hiroshima Screamer]

had similar probs with one i had but iv been told thats it normal , 2 mates have similar gauge one liquid filled one not and the both mine and the other liquid read the same as your one as apposed to the non filled which read 0 on the mark

[JimX]

Ah ok, I have a liquid filled one. Good to hear it's normal, though it still seems dodgy to me to have it like that! It was more the vacuum reading that I was worried about rather than just where it parks at when off. I will pay closer attention to the vacuum reading and see if it varies due to RPM or engine load or temperature or something.

[Hiroshima Screamer]

i wasnt to happy with it eaither hense the upgrade

[Guest RaBZ3174]

i had the same idle between - 20 n - 13 i was told it was normal