Have a fuel pressure gauge installed and was wondering if my FPR is bad. I can pinch the vac line and nothing happens but when i pinch the return line it shoots up to to 55 or so PSI(up from idle 38). There's no fuel in the vac line if i pull it off it's new also car is running rich that's why i ask. 94 B18C1

 

When you pull the vac line nothing happens? Is there vacuum in that line?

 

the idle goes up that's it, no prerssure change however.

 

Correction/bump. when i pull the vac line to the regulator the pressure rises by 8-9 psi

 

That's what mine does. Even with an adjustable FPR.

 

ok must be something else(heard a bad FPR can cause rich running). There's no vissable leaks but there is an extremly strong smell of gas upon start up/idling. i took out my evap system but i don't think it would cause that strong a smell.

 

so in short my FPR is fine ? and functions as it should

 

is this how a FPR is supposed to function ?

 

As far as I know.