Fuel pressure regulator
Discussion
Hi Gav,
From a little look about on the interweb it seems the correct standard fuel pressure regulator is getting tricky to find.
Correct fuel pressure is absolutely critical to the operation of any fuel injection system, & the fuel pressure regulator is what controls it.
A correctly functioning & calibrated fuel pressure regulator is therefore more important than any other component in the system.
Over the years ill informed performance hungry home mechanics tended to fit an adjustable rising rate regulator (especially to Lucas flapper equipped cars), at some point someone fitted one to your car.
I hate adjustable rising rate regulators, there are lots of s
t quality ones out there & if you don't have the kit to set one up correctly you are much better off fitting the standard one.
Another ill advised performance mod was to squeeze the casing of the standard fuel pressure regulator to increase fuel pressure, this is even worse than fitting an adjustable one.
So don't waste you time with a used one, you could just end up with a squeezed one.
The manufacturer invested a huge resource in developing what is quite a sophisticated fuel delivery system, what on earth makes some Muppet think he can improve it by messing with the fuel pressure always baffles me.
The fuel pressure regulator is very carefully designed to work in harmony with the fuel system, so if you are having starting & running issues it's essential to fit a standard one.
Or you will just end up chasing your tail.
Rimmer Bros is probably your best bet, quoting 3.5 litre V8 Rover SD1.
http://www.rimmerbros.co.uk/Item--i-EAC1284P
Jag XJ6 or V12 is rated the same but has threaded fuel line connectors so no good.
You need the flared ended fuel line fitting type.
The Bosch part number is: 0 280 160 200
It may be branded Lucas as above but it's definitely a German made Bosch part.
The Lucas part no is: EAC1284
From a little look about on the interweb it seems the correct standard fuel pressure regulator is getting tricky to find.
Correct fuel pressure is absolutely critical to the operation of any fuel injection system, & the fuel pressure regulator is what controls it.
A correctly functioning & calibrated fuel pressure regulator is therefore more important than any other component in the system.
Over the years ill informed performance hungry home mechanics tended to fit an adjustable rising rate regulator (especially to Lucas flapper equipped cars), at some point someone fitted one to your car.
I hate adjustable rising rate regulators, there are lots of s
t quality ones out there & if you don't have the kit to set one up correctly you are much better off fitting the standard one.Another ill advised performance mod was to squeeze the casing of the standard fuel pressure regulator to increase fuel pressure, this is even worse than fitting an adjustable one.
So don't waste you time with a used one, you could just end up with a squeezed one.
The manufacturer invested a huge resource in developing what is quite a sophisticated fuel delivery system, what on earth makes some Muppet think he can improve it by messing with the fuel pressure always baffles me.
The fuel pressure regulator is very carefully designed to work in harmony with the fuel system, so if you are having starting & running issues it's essential to fit a standard one.
Or you will just end up chasing your tail.
Rimmer Bros is probably your best bet, quoting 3.5 litre V8 Rover SD1.
http://www.rimmerbros.co.uk/Item--i-EAC1284P
Jag XJ6 or V12 is rated the same but has threaded fuel line connectors so no good.
You need the flared ended fuel line fitting type.
The Bosch part number is: 0 280 160 200
It may be branded Lucas as above but it's definitely a German made Bosch part.
The Lucas part no is: EAC1284
Edited by ChimpanLucky on Monday 28th May 13:47
ChimpanLucky said:
Over the years ill informed performance hungry home mechanics tended to fit an adjustable rising rate regulator (especially to Lucas flapper equipped cars), at some point someone fitted one to your car. I hate adjustable rising rate regulators, there are lots of st quality ones out there & if you don't have the kit to set one up correctly you are much better off fitting the standard one.
Experience makes it very hard to agree with you..especially using the same facts. t quality ones out there & if you don't have the kit to set one up correctly you are much better off fitting the standard one. OF COURSE the proper fuel pressure is a given a Flapper relies on (duh)! For that very reason an adjustable regulator, coupled with a permanently installed pressure gauge, can better guarrantee it is precise. As you say, the stock regulators are now, not only hard to find but they also do not give an apparent sign of their failing, which is most often gradual. However, the higher quality adjustable regulators with an attached guage can be verified at a glance. That is a huge plus for a EFI system with no self-diagnostics. In an instant, one can ascertain the proper functioning of the regulator but also whether a fueling issue is involved at all.
If anyone wants an original regulator..I have a box of them. They were all working when removed.
Edited by plushuit on Monday 28th May 15:52
plushuit said:
ChimpanLucky said:
Over the years ill informed performance hungry home mechanics tended to fit an adjustable rising rate regulator (especially to Lucas flapper equipped cars), at some point someone fitted one to your car. I hate adjustable rising rate regulators, there are lots of st quality ones out there & if you don't have the kit to set one up correctly you are much better off fitting the standard one.
Experience makes it very hard to agree with you..especially using the same facts. t quality ones out there & if you don't have the kit to set one up correctly you are much better off fitting the standard one. OF COURSE the proper fuel pressure is a given a Flapper relies on (duh)! For that very reason an adjustable regulator, coupled with a permanently installed pressure gauge, can better guarrantee it is precise. As you say, the stock regulators are now, not only hard to find but they also do not give an apparent sign of their failing, which is most often gradual. However, the higher quality adjustable regulators with an attached guage can be verified at a glance. That is a huge plus for a EFI system with no self-diagnostics. In an instant, one can ascertain the proper functioning of the regulator but also whether a fueling issue is involved at all.
If anyone wants an original regulator..I have a box of them. They were all working when removed.
Edited by plushuit on Monday 28th May 15:52
The OP does not have fuel pressure testing kit.
I have tested many of the regulators with built in gauges on a professional fuel pressure testing rig, and regularly found them to be anything up to 20% out.
When designing the system the manufacturer spent a huge amount of time of money developing every component to work in harmony before they released it to the general public.
If correcting a fuelling issue is the objective, fitting a standard fuel pressure regulator would always be the starting point for a professional.
By all means donate one of your spares to the OP, just make sure it isn't one of your squeezed ones.
Just had a call from Solitude to say he took my advice & fitted a standard fuel pressure regulator.
Result?
In Gavin's own words:
"it's running much beter, it' signifantly smoother"
Has anyone got a photo of how the standard fuel pressure regulator should be correctly mounted?
The Chimp.
Result?
In Gavin's own words:
"it's running much beter, it' signifantly smoother"
Has anyone got a photo of how the standard fuel pressure regulator should be correctly mounted?
The Chimp.
FWIW, that bracket is a typical SD1 part and nothing to do with buying a new FPR. I recognise that image! See here
http://www.vintagemodelairplane.com/pages/Rover_Te...
and read the very informative PDF from this link to my web page. A full understanding of how the pressure system works will add greatly to resolving any inherent problems.
http://www.vintagemodelairplane.com/pages/Rover_Te...
and read the very informative PDF from this link to my web page. A full understanding of how the pressure system works will add greatly to resolving any inherent problems.
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