Jump to content


TR6 fuel pressure problem

  • Please log in to reply
6 replies to this topic

#1 steve m

steve m
  • TR Register Members
  • 4 posts
  • Location:Moray

Posted 08 August 2018 - 09:50 PM

Evening all, a friend has a CR6 that seems to have a fuel pressure fluctuation problem. He has a Bosch pump kit from Revington ,fitted 2 years ago, but recently has been cutting out and after checking the usual items he did a fuel pressure test . It was low and as he started to adjust the relief valve the pressure dropped !!
Anyone had this problem before ??

Regards. Steve
  • 0

#2 DaveN

  • TR Register Members
  • 752 posts
  • Location:Langley Berks
  • Cars Owned::TR6 cr chassis....one of the last ones!!

Posted 08 August 2018 - 10:49 PM

Fuel starvation? Is the tank outlet clear?
  • 0

#3 Mike C

Mike C
  • Registered User
  • 493 posts
  • Location:Melbourne Australia

Posted 09 August 2018 - 03:04 AM

He was closing  the relief valve? Opening it will decrease the pressure at the MU.

  • 0

#4 barkerwilliams

  • TR Register Members
  • 1,298 posts
  • Location:Hereford
  • Cars Owned::TR6 PI, Stag, Thoroughbred Race Horse, John Deere

Posted 09 August 2018 - 05:55 AM

Has he checked the voltage at the pump and examined the earth conection to ensure the pump is able to run at full speed to generate the pressure needed?



  • 0

People of character do the right thing even if no one else does, not because they think it will change the world but because they refuse to be changed by the world.

#5 stuart

  • TR Register Members
  • 18,764 posts
  • Location:Grampound Road Cornwall
  • Cars Owned::TR Restoration,. Owner of Watermill Carriage Co Ltd restorers of 50s and 60s British sports cars, especially TRs.

Posted 09 August 2018 - 09:50 AM

If its an original type PRV then it will probably need a rebuild, they are very sensitive to over adjusting. The diaphragm type with external adjuster are easier to set.


  • 0

TR4A Royal blue TR5 White  Volvo V70 D5 twin turbo
Plus whatever TR is in workshop for restoration.

#6 Kevo_6

  • TR Register Members
  • 1,562 posts
  • Location:Dorset.
  • Cars Owned::1972 TR6 CP
    1981 Lancia Beta Coupe 1600

Posted 09 August 2018 - 10:08 AM

There are some small in-line plastic strainers, 1 in the entry to metering unit and one each of the Lucas pump and PRV not sure on the Bosch setup, I had one go soft and collapse which restricted the bore and reduced my pressure.
  • 0

Cheers Kev.

#7 steve m

steve m
  • TR Register Members
  • 4 posts
  • Location:Moray

Posted 09 August 2018 - 07:16 PM

Thanks guys, word tonight is he has cracked it, looks like replacing the wiring to the pump did the trick. Many thanks to you all
  • 0

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users