Thread: FPR rebuild kit

Hmm, I don't like the "increased fuel pressure "bit.

My assessment of the TD5 is that it is a non mixture feedback system (no O2 sensors) so it will depend on the fuel pressure to get the correct mixture for a given MAF volume and boost.
ie the map.

So it will run rich. May have extra full boost power. May smoke. May blow the return hose on an EU3.

But on the other hand may be great!
Like a cheap remap LOL.

Has anyone had experience with high pressure fuel pressure regulators?

When I did mine about 2 years ago, I checked with a mirror and torch and skinned knuckles where the fuel was leaking and bought a cheap UK kit as there was no evidence of a leak from the fuel regulator weep hole. Mine is still good to go.

Regards Philip A

I bought the kit off eBay rather. It's been a few years now and still no issues.

Originally Posted by twr7cx

I bought the kit off eBay rather. It's been a few years now and still no issues.

Did you get the regulator with increase pressure as well in the kit you bought from ebay?

4 bar from a VW is all you need

Originally Posted by dearot

Did you get the regulator with increase pressure as well in the kit you bought from ebay?

No, I didn't replace the regulator, just the seals and gasket - e.g. Land Rover Discovery 2 TD5 Fuel Pressure Regulator Repair KIT Gaskets | eBay .

I have yet to find any authority on what pressure the standard fuel pressure regulator is as used by Land Rover. So potentially 4 bar might actually just be the standard pressure - or it might be a case of the difference is so small e.g. 3.9 vs 4 bar - that it makes no difference. The only one I have seen available are 4 bar units.

The fuel rail is rated in RAVE at 4 bar..

What more authority do you want?

From this little youtube it looks like the pressure in this case anyway is 3.5/3.6 bar.

[ame]https://www.youtube.com/watch?v=pdhheH7_ixk[/ame]

If his FPR and gauge are correct a 4 bar regulator would be about 11% to 14% rich. To me this is quite a bit.
Give a bit of extra on full boost but I wonder what it does to fuel economy.
Regards Philip A

This post says 4 bar which is 58.012PSI.
Device to measure Td5 fuel pressure - Discovery Forum - LR4x4 - The Land Rover Forum
So why say high pressure FPR at 60 PSI?
I would think 2PSI would be well within error .
Regards Philip A