Fuel Regulator 350i

[dukeenfield]

Hi,My fuel regulator is showing about 25 p/psi on tick over and about 38 p/psi when reved up,does this sound about right,thanks Ken.

[chunder]

dukeenfield said:

Hi,My fuel regulator is showing about 25 p/psi on tick over and about 38 p/psi when reved up,does this sound about right,thanks Ken.

Between 38 and 40psi is the ideal pressure as measured as pressure differential against manifold pressure. The regulator is designed to keep a constant pressure in the fuel rail compared to manifold depression so that each injector fires a known quantity of fuel for a given opening time and the fuel isn't sucked in at idle.

Not sure what kind of manifold vacuum your engine pulls at idle (you can check if you have a meter and connect it to the pipe from the regulator to the manifold) would have thought 13 psi is a bit high but if not then sounds like it's working fine.

[dukeenfield]

Thanks for help,I have a fixed vaccum gauge connected and at tick/over its on about 15 psi vaccum.Also have a fixed petrol gauge connected,showing 24/25 psi at tick/over.

[chunder]

dukeenfield said:

Thanks for help,I have a fixed vaccum gauge connected and at tick/over its on about 15 psi vaccum.Also have a fixed petrol gauge connected,showing 24/25 psi at tick/over.

It's working perfectly then - one thing you don't have to worry about