FUEL PRESSURE REGULATOR

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panadero
2.0 16v
Posts: 102
Joined: Wed Mar 23, 2011 2:05 pm

FUEL PRESSURE REGULATOR

Post by panadero » Fri Jan 06, 2017 7:45 pm

Does anyone know if the fuel pressure regulator attached to the hp pump on a 406 2.0 hdi (04) can be tested off the car?

If so I will remove it and take it to be tested rather than drive the car to the garage as it could well stall en route. Alternatively I am thinking of simply replacing it with a cheap second hand regulator as a matter of course just to see if this will cure the fault.

charliedog
1.8 8v
Posts: 47
Joined: Wed Sep 04, 2013 9:13 pm

Re: FUEL PRESSURE REGULATOR

Post by charliedog » Mon Jul 03, 2017 9:38 pm

Pandora, Did you manage to fix your FPR problem? If so what was it? I have a similar problem

PeterN
3.0 24v
Posts: 1331
Joined: Sun Mar 04, 2012 7:04 pm
Location: Charmouth, Dorset

Re: FUEL PRESSURE REGULATOR

Post by PeterN » Tue Jul 04, 2017 9:28 am

The usual problem with them is that the filter gets blocked, it's the thing on the end that looks like a stainless steel tube only it has minute holes in it which I can't see although it has a rough feel to it. If you can find a way of cleaning it fine but I fitted a cheap secondhand one and it was OK. As long as it comes from a working car it should be alright. Some of them don't have the filter.

Peter

dirtydirtydiesel
3.0 24v
Posts: 1209
Joined: Sun Apr 28, 2013 11:02 pm
Location: Coalville, Leics.

Re: FUEL PRESSURE REGULATOR

Post by dirtydirtydiesel » Tue Jul 11, 2017 6:58 pm

I have just got round to replacing mine :roll: .

Here's a few pictures with some descriptions.
Fuel pressure regulator.jpg
So here's the fuel pressure regulator ( old one in picture ) with the fuel filter & housing removed for easy access.
You need to clean up the fuel filter housing spotlessly clean BEFORE removing the fuel pipes, so as not to contaminate
the fuel system :roll:
It'll is also a good idea to block off the three fuel pipes ( good filter kits include these)
I also swing the three fuel pipes out of the way for easier access :D
Fuel pressure regulator removed.jpg
Fuel pressure regulator removed.

It's also a good idea to spotlessly clean the fuel pump where the pressure regulator fit's.
For cleaning I use AC90, it's just like WD40, GT85 ect, but I get mine from work :wink:

Just for the record the tools needed are 3/8 wrench, 150mm extention & 75mm extention, 10mm socket, 6mm hex bit that fit's into socket extention, 3/8 wobble bar & torx 30 bit + small hammer, small bit of soft wood (12mm x 150mm) aprox, tub for old diesel & tooth brush for cleaning :)
Old & new fuel pressure regulators.jpg
Old & New Fuel Pressure Regulators, genuine Bosch one from Ebay :cheesy:
The new metal gasket does not come with the regulator, I got one from? , yes ebay :wink:
New fuel pressure regulator fitted.jpg
New fuel pressure regulator fitted, before fitting lube the o-ring with clean diesel.
Fuel pressure regulator completed.jpg
All back together :cheesy: , just the engine cover to replace,
I would strongly advise fitting a new fuel filter when carrying this out, & fill up the filter housing 3/4 full with clean diesel or diesel cleaner BEFORE refitting the new filter :) .


Take for test drive & find out that it's no fxxxxxg different :x.


So I can only hope it cures my low fuel pressure when towing :roll: .


My old perfectly serviceable unit will be cleaned as per pro Steve's instructions from (HDI tuning) , fitted with new seals and gasket
& Advertised on here & ebay.
When I get back from my holiday 8) .

Hope this is of some help to other's.


Ps I checked my fuel pressure using pp2k & I am seeing 1345 bar, so no problems there :?
I will be quizzing you all on injector correction values though when I get back :roll:.

Latter's DDD 8) .
2002 110 HDi estate, Rapier in monaco blue! ( found quite a bit more power :cheesy: )
1999 3.0 V6 SE coupe in Diablo Red ( my baby )
2006 206 1.4 16v sport in Aegean blue ( wife's shopping trolley :roll: )

pp2000 owner / user, can offer Diagnostic's / fault code, reading / clearing for beer tokens in Leicestershire.

dirtydirtydiesel
3.0 24v
Posts: 1209
Joined: Sun Apr 28, 2013 11:02 pm
Location: Coalville, Leics.

Re: FUEL PRESSURE REGULATOR

Post by dirtydirtydiesel » Sun Jul 30, 2017 6:52 am

So I'm back & guess what,

The new fuel pressure regulator didn't fix my problem when towing :(
I'm starting to think she's protesting at towing the caravan :lol:
Lot's more testing to be done, will post back later with more details / info / questions :wink:
2002 110 HDi estate, Rapier in monaco blue! ( found quite a bit more power :cheesy: )
1999 3.0 V6 SE coupe in Diablo Red ( my baby )
2006 206 1.4 16v sport in Aegean blue ( wife's shopping trolley :roll: )

pp2000 owner / user, can offer Diagnostic's / fault code, reading / clearing for beer tokens in Leicestershire.

PeterN
3.0 24v
Posts: 1331
Joined: Sun Mar 04, 2012 7:04 pm
Location: Charmouth, Dorset

Re: FUEL PRESSURE REGULATOR

Post by PeterN » Sun Jul 30, 2017 8:35 am

I have never had an injector fail on a 406 Hdi 8 valve - there's always a first time of course.

Peter

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Doggy
Mod with a 2.2 HDi, De-Fapped!
Posts: 9900
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Location: Northants

Re: FUEL PRESSURE REGULATOR

Post by Doggy » Sun Jul 30, 2017 8:59 pm

Leak-off test would be my next move.

As a matter of interest, how bad are your injector correction values?
2003 HDi 2.2 6-speed Exec Estate

dirtydirtydiesel
3.0 24v
Posts: 1209
Joined: Sun Apr 28, 2013 11:02 pm
Location: Coalville, Leics.

Re: FUEL PRESSURE REGULATOR

Post by dirtydirtydiesel » Mon Jul 31, 2017 6:54 pm

Hi Doggy,
Yes I'm thinking the same, from memory 2 were + something & 2 were - something :roll:
I will have a session with pp2k & record the values.
2002 110 HDi estate, Rapier in monaco blue! ( found quite a bit more power :cheesy: )
1999 3.0 V6 SE coupe in Diablo Red ( my baby )
2006 206 1.4 16v sport in Aegean blue ( wife's shopping trolley :roll: )

pp2000 owner / user, can offer Diagnostic's / fault code, reading / clearing for beer tokens in Leicestershire.

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