Today I pulled a vacuum line off of my 1992 XJS V12 fuel regulator and found fuel in the vacuum line all the way to the intake manifold.
Does anyone know a good source to replace this part? EBC3387

 

Your up there.

I use SNG, or any of the other Parts Sponsors of this site, even from down here, NO issues.

The Bosch # for the Mareli cars is 0 280 160 508. Different from the Lucas cars.

 

Be sure its bosch or OE, some "Jag" sites sell junk regulators been down that road, had to go back to used/good condition bosch unit in the end.

 

I finally purchased a Bosch 3.0 bar while a 2.5 bar was totally unavailable. Hope increasing the psi by 7 psi won't be a problem.
Thanks much to my "down under" and "the over there" jag brethren for help.

 

3 bar will richen the mixture by 20%. Not a good idea as the various O2 sensors etc etc will be trying to correct the uncorrectable.

Buy this from grublogger, it includes the regulator, I know him and he is a very decent and honest guy.

https://www.ebay.co.uk/itm/Jaguar-XJ...-/124198484445

 

I did contact grublogger in the UK, after dealing with a ridiculous Ebay regulation in the UK that wouldn't allow a "fuel item" to be shipped to the USA we finally did an end-around and the used regulator works perfectly.
Thanks Greg in France!

 

I just did a search and it turns out this place in France seems to have them. I buy lots of bits for my other car from these people, and they are reliable and efficient.
https://www.oscaro.com/regulateur-de...08-29768-168-p

 

Sadly they report that the part is unavailable. That's the same story worldwide I suspect. Bosch and others have stopped production it appears.

 

Does anyone have a solution to replacing the no longer available fuel pressure regulator? My 1994 6.0 needs one with part number EBC10768 which supersedes to NAB3443AA. I believe the equivalent Bosch number is 0280160534 and I believe rated at 3.0 bar.
BC10768 which supersedes to NAB3443AA

 

FPR availability is becoming a problem for all models, including pre facelifts. Jaguar no longer supply and Bosch no longer make the EAC4864 for HEs; these were very widely used on Porsches, Mercedes, etc etc, none of which are available. Aftermarket ones are available but whether they have the same quality as the OEM Bosch ones is an open question.
I have been recently looking into adjustable aftermarket FPRs, USA made, which I believe to be our best bet. They need bit of plumbing, but nothing that is hard to do. Aeromotive, Holley, Fuelabs all seem to be good makes, but any experiences anyone has of them I would like to hear about. pre facelift HE engines run at 2.5 bar (36.35 psi), but as long as the adjustment available is in rangem the pressure can be set exactly. They also have gauge ports built in, so that side of things is dead easy.
They are not that expensive 150 to 200 USD with fittings. So I would seriously consider that option.

 

Thanks as ever Greg.

I contacted Fuel labs who responded very quickly with the following:None of our equipment is a direct OEM replacement. It would require the changeover to AN style fittings (-6AN specifically). You would have to source some kind of adapter to go from that two bolt flange on the end of your rail to a male -6AN. I have no idea if such a piece exists. If you’re able to clear that hurdle, you would want to look at our part number 54501 (25-90psi) if your OEM setup is a return style system or part number 57504 )25-65psi) if this is a deadhead/returnless setup.
of our equipment is a direct OEM replacement. It

 

I have no direct experience of the 6 litre fuel rail. However, it must be possible to make an arrangement so that a fuel hose attaches to the fuel rail outlet and then all it has to do is go to where ever you fit the new regulator. The regulators have AN threads etc, but you can buy adaptors that srew into the regulator with 8mm push on spigots for the hose and fuel clips, eg:
https://aeromotiveinc.com/product/an...apter-fitting/

can you post a photo of the OEM FPR setup on the 6 litre?

 

This is what I have available at the moment

 

Looking at the photos, am I correct in thinking that the system works as follows:

• Fuel goes in to the rail at the far side in the second photo
• the regulator is at the end of the opposite side rail in the top photo
• your finger is on the RETURN line exiting from the regulator casting in the top photo?

If so, and if your regulator his faulty (is it?) then I think the only way to proceed would be as follows:

• In the third and fourth photos, a clamp plate holds the regulator in position int its casting.
• The return line screws into this casting. Assuming this is correct:
• I would make a blanking plate in place of the clamping plate, doing away with the faulty OEM FPR. This would, I am assuming without looking at the actual piece, allow the fuel to exit the casting to an externally mounted FPR. Thus the rail and line would be under pressure all the way to the FPR. Then connect the FPR exit to the OEM return line, and the vac take off from the FPR to the OEM spigot on the manifold.

Finding a place to mount the FPR is your next problem. Aeromotive make a particularly small one that might help:
https://aeromotiveinc.com/product/co...efi-regulator/

 

Bosch still makes similar FPRs for Mercedes as shown in the link. However, the ones I'm familiar with are about 3.5bar or so. I wonder if they could be made adjustable somehow? Or there may be others that are in the right range. The only difference externally that I see is the position of the vacuum ports. Obviously the size and position of the o-ring seals would also need to be checked.
Anyway, I'm going to order one for my Mercedes while they are still available!
https://www.fcpeuro.com/products/mer...tor-0280160587

 

It might be just a matter of finding one like that in your link that runs at 3 bar. Just done a search for "bosch 3 bar fuel pressure regulator"!
Loads of hits! They look identical to the 6 litre one, pretty cheap, well worth buying one to try and if it does, another for the parts drawer.
or

etc etc

 

Those are cheap enough to give them a try. I'd carefully check that they
give correct fuel pressure both with and without vacuum.

 

They are all genuine Bosch 3 bar FPRs, which the 6 litre needs as opposed to the 5.3 2.5 bar, so I do not see the problem, if they fit.
Corrected! They are not Bosch! But there are loads to try. And this one says it is a genuine Bosch:

 

Uh, the ones at the links you posted are unbranded, or "Hongwin". Neither is Bosch, unless I'm missing something.

 

https://www.autohausaz.com/pn/137522...BoC3eMQAvD_BwE