volsfan92

iTrader: (7)

So I hooked up a new mechanical guage and it's only hitting 14-15 psi.. On the stock guage I was getting 17-18psi.. I tapped into the line coming from top of mani for boost.. Pretty sure I have a vacuum leak around the manifold gasket.. Will this cause low boost readout on the new gauge?

Sharkey

iTrader: (1)

what pulley are you running?

Sl0wbaltSS

Or maybe they both read differently.

volsfan92

iTrader: (7)

It's a 2.6 and it doesn't seem like it should be that far off

volsfan92

iTrader: (7)

Could it be that the mechanical is more accurate?

SSfamilywagon

iTrader: (2)

14-15 psi is really low on a 2.6 unless you'd have ported head ,cams and free flowing exhaust.

I'd double check your connection at the source and the back of gauge itself.

Sharkey

iTrader: (1)

what brand of gauge is it?

mrbelvedere

iTrader: (3)

air temp and altitude can be part of it bad bypass actuator also

volsfan92

iTrader: (7)

I've checked all the lines.. I bought some good line instead of the clear **** and it's the glowshift gauge I've got friends that use it with no issues

SSfamilywagon

iTrader: (2)

If you trust the gauge and your install then you need to check your by pass valve. Probably not closing all the way and bleeding boost

volsfan92

iTrader: (7)

Thats the black thing on top of sc correct?? Also how could I check it

volsfan92

iTrader: (7)

The valve moves easily on the bypass interceptor reads 16-17 on manifold psi