Correction - the fuel pressure regulator does seem to leak. 5 or 6 drips came out from the little clear pipe coming out the regulator when I disconnected it. I assume it's gas from the regulator. Is this amount normal or do I definitely have a bad diaphragm?
On a side note I bought a used EHA from a scrappy yesterday - £2! Mine was potentially leaky. I took it off a 300E with 170k. Fitted but the problem is still present so I'm persevering.
Don't suppose a fuel pressure regulator from a 300E will work on my 2.5-16?
I would imagine not because the fuel pressure specification is different for a M102 8v and M102 16v.