Need a Bosch fuel pressure regulator

[Kobyjoe]

I need a Bosch fuel pressure regulator for a Bosch fuel injection system on my Vauxhall 2 L engine. The part number is 280160288. Any help on finding this would be very much appreciated

[MV8]

It looks like GM #90411542 (PR313) may be a suitable replacement. Compare to what you have as far as fitment and 42-43psi operating pressure.

[Kobyjoe]

Thank you very much I will try to find one

[Kobyjoe]

I found the used part at a salvage yard in Wales. They were kind enough to sell it to me and ship it to the US. It is from a Vauxhall Astra XE engine. Now I’m trying to find out what the recommended fuel pressure is for this engine .  before replacement I was measuring 40 psi. Now, I am measuring 30 psi. The idle of the engine and the subjective “richness” of the combusted air fuel mixture seem much better with the replacement part

[MV8]

I suggest picking up a factory Opel Astra (probably the G model) service manual if that covers your specific year model 2.0l. I would expect to see 40 psi at idle. It could be the one you bought used is not sealing well enough. How high is the pressure with the vac line unplugged?

[Kobyjoe]

With the ignition in run mode( fuel pump on), the pressure is 28. When ignition is on, pressure goes to 29. With vacuum detached, it goes to 35. Also, there is no drop off in pressure from 28 after 15 minutes in run mode

[MV8]

I guess I should have asked why you wanted to replace the fpr. A weak/failing pump and partially clogged fuel filter can cause lower pressure. The pumps wear out. If they ever suck air, they are usually done. Good news is that a bosch type pump is fairly universal so easy to find.

[Kobyjoe]

Good question about the FPr. When I disconnected the vacuum line, I had fuel coming out of the fuel pressure regulator. I knew that the diaphragm was shot. Also, when I would start the engine, I get a gas smell and a cloud of dust out the exhaust. Also, the idle was very rough. Those last two problems are now fixed since I replace the fuel pressure regulator, I just was unaware of what the fuel rail pressure should be

[MV8]

Based on what you've said, I'm guessing the pressures are probably about what they should be. They fall in line with some other machines (like the early Taurus SHO). If I still needed a hard to find regulator, I'd be tempted to switch to a high quality (for safety), inline universal, vacuum referenced regulator that is adjustable and has a built in gauge, not that I would ever raise it much over specification. 

[Kobyjoe]

Thank you very much. I really appreciate being able to communicate with you and get a second opinion about these things. I once had significant mechanical skills, but most of these are obsolete now and I’m really enjoying picking up the opportunity to rehabilitate this 30 year old sports car. I think I’ll just enjoy driving it for a while and see if the pressures maintain