I was just looking at my boost gauge and when i gave it gas the vac went to 25 that back to 20 is this right i also have the 3.20 pulley.
thanks,james
it sounds liek you dont quite have it hooked up right.
what you need to do is go to the autozone or equivalent and buy a oil pressure guage instalation kit. Its a long nylon hoseand it screws together then into your guage . and you just use a small piece of vaccum line to connect the nylon tube to your vacuum port.
