Speedtoys

I smell fuel in the lines.

In 10 minutes of vacuum at 25 inches, while running, the most ANY of them came down on the gauge was 1.5".

No liquid out of any of the ports.


Fuel pressure did not change when the pressure regulator had no vacuum, or full vaccum.

I sorta expected that to change..a lot.


??

GregBBRD

The vacuum test has fooled me many times.

I look inside....or remove them and give them a hard "wrist twisting shake"....like trying to dry a paint brush.....and see if any fuel comes out of the vacuum fitting.

The regulator....if stock (not sure what you are running with your supercharger) should change fuel pressure 6-8 pounds with and without vacuum......with the fuel pump running.

Speedtoys

Ya..stock FPR at this point, and the pressure does not change with vaccum applied.

FPR is 3yrs old.

But the vac line off of the drivers side rear damper smells pretty gassy, but dry.

Thanks for the hints Greg.

GregBBRD

If that is the case, you need a fuel pressure regulator, minimum.

I'd think that the supercharger manufacturer would be using that regulator to add extra fuel under boost, too.

Lizard928

Stock regulator is all that is needed but will increase pressure with boost.

If the pressure doesnt change with/without vacuum its toast.

If it smells like fuel, its likely dead.....

JHowell37

What about the dampers? Should the fuel pressure change when you apply or release vacuum on them?

Lizard928

Jhowell,
No, pressure will not change.

Mongo

I just replaced all three units, the two dampers and the FPR rather than troubleshooting which is bad. Considering that the car was still on the original units, I figured it would be best just to do them all at once.