boost gauge reading incorrect

[lj~R]

Bought a greddy boost gauge a while ago. But it was fine until I fitted the gauge on my car and took off it again. Now it's reading like pic. It is a mechancial boost guage. I've no idea how to fix this problem. Thanks

 

[meddler]

Have you dropped it? It could be because of atmospheric pressure. Does the needle move from day to day? I think the only way to know for sure is to hook it back up to the car and try it out.

 

[lj~R]

I didn't drop it but when I took it off its reading like that. Also I tried to hook it back and start engine again its still same though.

 

[meddler]

What about when the engine was running? Did it give indications that you expected? Maybe the needle needs a little adjustment.

 

[lj~R]

Yeah, I think the needle need to be adjusted but I don't know how to open the boost gauge.

 

[lj~R]

I opened it now, but seems no way to adjust the needle



Problem solved, just took out the needle and place it back to 0 and it's done.

 

[meddler]

nice. just make sure that your indications are correct. You don't want to be showing 10psi when you really have 15psi. (bit of an extreme case, but you get the idea)