M20 b25 pressure regulator which one? 2.5 bar or 3 bar?

[markus_74]

Hello, e30 Zoner

I want to replace my pressure regulator because sometimes it is difficult to start especially while engine hot.

Which pressure regulator should I use? 2.5 or 3 bar?

Thank you
Markus

[Brdjo]

hello,

Did you test it, to make sure that fpr is defective? m20b25 use 3.0 FPR.

[Brianmoooore]

m20b25 use 3.0 FPR.

This is what I would have answered if the car was a UK model, BUT, the ETK also lists a 2.5 bar FPR for the M20B25, for all production dates.
Best answer is to replace with the same as is fitted now. Pressure should be written on the side of it.

[reggid]

its 3b unless JAP, my money is on injectors. easy to test the regulator though

[jonathanyeah]

If fuel is coming out of the vacuum pipe at the top of the FPR then it is shot.