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Zetec fuel pressure regulators
cliftyhanger - 21/4/17 at 11:37 AM

Just checking my st170 install in my spitfire before plugging the ecu in.
Turns out the golf pump I have fitted in the fuel tank is pushing out about 3.5bar, but the blacktop fuel rail has a regulator fitted rated at 3.8bar, so will not open. Means the pump will burn out I reckon.

If there a pressure regulator that will bolt on the fuel rail and rated at 3bar?? Or do I need to get an aftermarket type?

Pointers appreciated. Pressing on with the checking process, and the engine should fire when we get that far, but will only run for a short time until the FPR issue is sorted. (and I can't change the fuel pump, unless there is a straight swap available)

HowardB - 21/4/17 at 12:02 PM

will the 3bar reg from a silver top fuel rail drop in?

cliftyhanger - 21/4/17 at 12:53 PM

Not sure, will find some pics...
is it deffo 3 bar?

HowardB - 21/4/17 at 01:09 PM

mine is and I may have a spare,.

Just a thought,...

Has the golf pump got a built in regulator and so is running as it should, or is it that the pump is faulty?

I had in my mind that petrol injector pumps run at circa 10bar


silky16v - 21/4/17 at 02:59 PM

shouldn't be using an low pressure intank pump on the ST170 Duratec

soon as revs rise you will drop fuel pressure, fit a proper aftermarket Bosch external inline pump

cliftyhanger - 21/4/17 at 04:25 PM

Samepump seems to be supplied to all tehgolfs including the turbos, so should be adequate. I will see if there is a better version.