guys i had a boost gauge installed and they took the vac hose from this sensor to the boost gauge. Well i thought i might need this sensor hooked up to vac. So i teed it agin from the boost gauge. The problem is that when i tee it back my boost gauge reads 5psi lower. Does anybody know what this sensor is and do i need it hooked up or can i just cap it. Sorry for the retarded spelling and gramar i am in a hurry. thanks.

 

Looks like a boost sensor for an electric boost gauge... you need it.

 

well it may have something to do with fuel.so take the tee out, and replace the hose. move ur boost line to the top of your diverter valve (BOV)

 

^ that sounds like a good idea. Thanks, do you know what it is? its from the factory and has nothing to do with my greddy boost gauge.