Welcome, Guest. Please login or register.
Did you miss your activation email?
Sign in with Facebook Sign in with Twitter Sign in with Google Sign in with Linkedin Sign in with Microsoft

Hello! Welcome to the Ford and Volkswagen MPV / SUV Forums.
Dedicated forums for the Ford Galaxy, S-Max, C-Max, B-Max and Kuga.
User groups for the SEAT Alhambra, Volkswagen Sharan, Touran, Tiguan and Touareg!

Owners Forums for Ford and Volkswagen MPVs / SUVs

Ford Galaxy S-Max C-Max B-Max Tourneo Connect / Volkswagen Sharan Touran Tiguan Touareg Caravelle / SEAT Alhambra Alteca 

 Mk1 and Mk2 VW Sharan  Mk1 and Mk2 Ford Galaxy  Mk1 and Mk2 SEAT Alhambra  Ford C-Max B-Max  VW Tiguan  VW Touran  Mk3 Ford Galaxy  Mk3 VW Sharan  Mk3 SEAT Alhambra  VW T4 T5 Caravelle Transporter  Ford Tourneo Connect  VW Touareg

Site Notification:

FordMPV is currently experiencing service disruption caused by a database error.
A backup of the database has been restored but new member registrations are currently not possible.

We Support:


Recent Forum Topics:

Google Translate:

Ford Galaxy Mk3 Forum:

Author Topic: Low Fuel Rail Pressure and leaking fuel line  (Read 1371 times)

Offline geedle

  • *
  • Posts: 7
  • Thanked: 0
  • Model: Galaxy Mk3
  • Spec: 08 140
  • Region: North West
Low Fuel Rail Pressure and leaking fuel line
« on: January 03, 2019, 05:14:27 PM »

the low pressure line on my MK3 galaxy (TDCI 143) had a couple of leaks - one was a poor bodge by the previous owner.  It involved cable ties, inner tube and some kind of glue.  I've repaired all of the leaks and there are now no longer any bubbles in the clear site hoses.

I thought that they were the cause of it loosing power under load, but now it continues.  Forscan shows errors for low fuel rail pressure and if you watch the fuel rail pressure, it droppes to about 4000 KPa when it looses power.  It jumps up suddenly and the car regains full power.

Any pointers or tests I can do from here?  How to I diagnose a fuel pressure regulator vs a high pressure fuel pump?  My concern is that all the air damaged the high presssure fuel pump.

Thanks, Geedle.

Offline johnnyroper

  • *
  • Posts: 3239
  • Thanked: 170
  • Model: Galaxy Mk2
  • Spec: 02 tdi 115 ghia
  • Region: South West
  • Country: United Kingdom
Re: Low Fuel Rail Pressure and leaking fuel line
« Reply #1 on: January 03, 2019, 07:16:36 PM »
It’s a difficult one as without specialist equipment it is a bit of trial and error.
If it was me I would replace the pressure sensor as it’s easiest and cheapest and see how it performs. Of fault remains then you are looking at hP pump

Offline geedle

  • *
  • Posts: 7
  • Thanked: 0
  • Model: Galaxy Mk3
  • Spec: 08 140
  • Region: North West
Re: Low Fuel Rail Pressure and leaking fuel line
« Reply #2 on: January 06, 2019, 11:21:42 AM »
So on these the pressure sensor and the pump are one unit, though can be separated. I got the whole assembly from the scrap yard from a Focus of a similar vintage. The numbers stamped in the castings were different and one of the inward fuel line connection was different to clear the cowling on the galaxy.

It took 10 mins to remove from the focus and about 2 hours to squeeze into the galaxy. Bled down using the return line and started in an impressive cloud of smoke. It's like a whole new car. Less smoke and more power. I reckon it had been on the way out for a while. £40 well spent!

Cheers, Geedle