Volvo 480 Club Europe

Hi all

I was just wondering what/if anything would happen if i removed/bypassed the fuel pressure regulator since i'm pretty sure that is what i causing my intermittent issue with accelerating under load and the lack of power.

Tia

You will blow your injectors up!

I have a brand new one you can try if you want it. I can post it tomorrow to you. Try it out. If you want to keep it, pay me the £25 I paid for it, or, send it back if it doesn't fix your problem.

Hi James would you happen to have a picture of yours so I can check it against mine I can give you an email address if that's easier

It looks like this, but this is a stock image‎.

It doesn't look the same James mine doesn't have any holes for fixing bolts, just a straight "in" and "out" it's not attached to anything other than those for the inlet/outlet.

I think that is just a non-return valve. Your regulator is on the end of your fuel rail. It is vacuum powered.‎

Photo borrowed from another post:

Apologies Shane, I've just checked the parts catalogue and the pressure regulator that I have might be for the later 1.7 cars‎, not the 2.0 cars. I will dig it out tomorrow and see which I have

Your fuel pressure regulator is still on the end of your fuel rail but the part number is 3464447‎. Item 5 in this picture:

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Here's the valve you were looking at first.‎ I suppose it would be worth checking to see if it still works as a non-return valve while you have the fuel pressure regulator off if you do change it. I think it's purpose is to keep petrol available to the engine for easier starting.



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Well don't i feel like a burke... I thought it was that what i had circled even a mate who is big into mechanics told me it was that....Shows what he knows eh !

James thank you once again for going the extra mile to explain this to me, Now i understand... I Would have been knackered otherwise.

Just to clarify that the non return valve is fine it's never had a problem starting ever...

So it looks like i'm going to have to get to grips with this is.. Is it a particularly difficult job getting to the FPR or is it just a case of taking the bank of four pipes (Not sure of the technical term) of to get to the injectors etc...

It's easy peasy to change it just depends whether or not you can get it off with the larger 2.0 manifold in place.‎ You shouldn't have to take the fuel rail off or any injectors as it is just bolted on the end of the rail. 
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Two bolts, vacuum pipe, some fuel will spill‎.‎
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On our site, it mentions that is does non-return and damping to compensate for the injectors opening:
viewtopic.php?t=11172

Just read the French site (via Google translate) and it actually does some vibration damping in the return line to avoid the noise of the injectors reaching the cabin along with its more obvious function!
https://www.volvo-480.org/forum/viewtopic.php?t=41269

So, I've learnt something tonight too!