fuel pressure regulator.
 

Hi people

well ive just fitted a walbro uprated fuel pump to my 96 wrx import and ive been told i should next fit a fuel pressure regulator? ive seen them about but not sure what they do? where they go? what should they be adjusted to?

any help would be great.

thanks

c.

a decent one like the FSE brand are usally preset to 1.7 times the normal limit, only ajust them if you know what you are doing

if you are not planning a remap etc then it is a pointless exercise fitting a fuel pressure regualtor.. you will be effecting the fuelling.

A walbro can sometimes over power the original fuel pressure regualtor at idle or cruise where the engine is not consuming much fuel and lots of the fuel needs to flow back to the tank.. due to the increased flow from the pump the regulator cannot regulate the fuel pressure to the required level and the pressure increases.. the increased pressure means more fuel is injected when the injector opens.. if it idles and drives fine then you don't need to replace the fuel pressure regulator imho..

FSE are not the best fuel pressure regualtors and unfortunatly have a habit of losing pressure setting for no reason or not maintaining pressure when the engine is turned off.

Fuelab, SX etc are the better makes imho.

Simon

....
 

Thanks for that i was told i needed one if i ugrade the fuel pump but since the fuel pump ugrade its running fine so maybe ill leave it for now. while where on the subject would it be wise to change the fuel filter because i dont think its been changed in a while!

i dont actually know where it is so can somebody point me in the right direction please? 96wrx import.

thanks once again.

c

As you look at the engine is on the right side suspension turret.

Small black pot with two hoses going in at the top.

what he said :)