Boost gauge reads -10mmHg vacuum when off - Boost Forum

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Boost gauge reads -10mmHg vacuum when off
Monday, June 18, 2007 4:29 PM
Hi guys, I got my boost gauge hooked up, and even when it's off, it reads 10VAC. Does this mean that when I get up to 5psi, it is actually 10VAC + 5psi? It never actually seems to hit zero VAC/boost until it starts to boost (when it passes 0).



" To study and not think is a waste. To think and not study is dangerous. "

Re: Boost gauge reads -10mmHg vacuum when off
Monday, June 18, 2007 4:49 PM
Sounds like the gauge is broken to me. I had the same problem with 3 gauges before I got one that was accurate. My boost gauge reads at 0 when the car is off and when I got responses from others about the same topic I was told you should be at 0 with the car off.
Re: Boost gauge reads -10mmHg vacuum when off
Monday, June 18, 2007 5:00 PM
Broken gauge.



Re: Boost gauge reads -10mmHg vacuum when off
Monday, June 18, 2007 5:49 PM
If it's mechanical it's broke and will not give you accurate readings. There is no math to figure out want a broken autometer is reading.
Re: Boost gauge reads -10mmHg vacuum when off
Monday, June 18, 2007 6:53 PM
How do you have it hooked up? Any pics?




Re: Boost gauge reads -10mmHg vacuum when off
Monday, June 18, 2007 7:47 PM
Lemme guess....it's an Autometer gauge?



I used to race cars, now I race myself.
5K PB: 24:50
10K PB: 54:26
Re: Boost gauge reads -10mmHg vacuum when off
Monday, June 18, 2007 7:50 PM
Yup, Autometer Steet Comp 2... Brand new



" To study and not think is a waste. To think and not study is dangerous. "
Re: Boost gauge reads -10mmHg vacuum when off
Monday, June 18, 2007 8:13 PM
If it's mechanical, then you can adjust it I've had to do it to both my Autometers. Just pull out the bulb, stick a screwdriver in there and push out on the metal ring until you get it zeroed.



fortune cookie say:
better a delay than a disaster.
Re: Boost gauge reads -10mmHg vacuum when off
Monday, June 18, 2007 8:53 PM
You CAN adjust it but you shouldn't have to. Just more proof Autometer isn't as good as everyone wants to think.



I used to race cars, now I race myself.
5K PB: 24:50
10K PB: 54:26
Re: Boost gauge reads -10mmHg vacuum when off
Monday, June 18, 2007 8:56 PM
This one doesnt have an external bulb, it's internally lit... I dont think theres an easy way into it. Regardless, I took all the lines off and blew into the gauge, it landed back on zero eventually... started the car agin, it went down to 25inhg VAC at idle (normal??) then turned the car off and it went back to just slightly under 0. So I'm not sure what to think of this thing lol...



" To study and not think is a waste. To think and not study is dangerous. "
Re: Boost gauge reads -10mmHg vacuum when off
Monday, June 18, 2007 10:42 PM
You can also tighten/loosen the barb fitting the boost line connects to, and it somehow adjusts it (don't think that was intentional lol).



fortune cookie say:
better a delay than a disaster.

Re: Boost gauge reads -10mmHg vacuum when off
Friday, June 22, 2007 3:58 PM
I would just send it back to autometer. I bought a used gauge and emailed them that it was not accurate. They happily exchanged it for a good one. All I payed was shipping to them.
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