Boost issues

[coving21]

I haven't had any problems until it started to get really cold outside, my boost meter was reading around 14psi until it started to get cold, now its reading 10psi. I know this sounds stupid and I probably should of figured this out on my own but the boost meter itself is not going back to the zero mark when I shut the car off. I have a decent autometer which is only a couple of months old but I can't find the receipt or else I would return it. Does anyone think that the meter is messed up or am I having other issues?
Thanks for any help

 

[oldman]

The gauge should read zero with the car off but ignition on the "on" position. If it doesn't zero out, the gauge is off.

 

[coving21]

Thank you very much!!

 

[oldman]

Thank you very much!!

You're welcome. My last Autometer Phantom gauge was off by + 2.5 psi, put back my no name 10 year old gauge and it works perfectly, larger readings as well for old people.

 

[coving21]

good news I found the reciept going back tomorrow thanks again