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Formerly NA-TT
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1,268 Posts
Discussion Starter #1
Hey,

I have two used gauges--52mm Greddy Electric boost and EGT. What would be the problem if both gauges light up, but neither reads anything? The boost needle is just sitting at its highest point and the EGT is just sitting at its lowest point regardless of whether the car is on, off, idling, or boosting. Any ideas?

Do the Greddy gauges have a separate control box or anything like the Defi gauges?
 

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Formerly NA-TT
Joined
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1,268 Posts
Discussion Starter #2
I forgot to add...

I wanted a strong vacuum, so I connected a hose from like 4 places on the intake manifold to the black boost box. Could I have grounded the system or could these be bad gauges or what?
 
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