boost guage question

[red73psd]

alright i have a brand new turbo new up pipes no leaks and my gauge will only read 18 i have a map fooler after the T in that little line that goes to the map sensor. so how do i no if my guage is messed up. i no im getting over 18 psi. any ideas

[NCHornet]

Does the truck feel under powered? You can always hook up another gauge and compare the readings?

[red73psd]

not at all. if i hook up another guage will i have to redo the t fitting and the hot and ground wire

[bigcountrysg]

Where does your boost gauge hook into.

[red73psd]

you mean the positive lead. im no t sure but im guessing my runnin lights switch.

[bryanbrown]

Maybe your wastegate is opening too early. Unplug (or tighten) it and see what you get. Can you tighten the banks WG?

[bigcountrysg]

Originally Posted by red73psd

you mean the positive lead. im no t sure but im guessing my runnin lights switch.

Is your gauge electrical or mechanical. mechanical uses a rubber or poly hose to obtain its reading. If that line is after the boost fooler then that would be the reason why you only have a reading of 18 psi. If your line is before the map fooler then you would have a true reading. To me it sounds like your gauge is after the boost fooler.