d5 diesel leak off test

Max HEADVROOM · Jan 5th, 2019, 13:40

hi all, iv done a leak off test as its not starting up that well in the morning.

im no expert, but nothing seems to be shouting out at me on what iv found.

i run the test for exactly 4 mins and got roughly 30-40mm of diesel and i dont know if thats excessive or not.

i did however find that some muck had come from 2 of the injectors and thats after a very recent liquid moly purge?.

TIA

Al.

Max HEADVROOM · Jan 5th, 2019, 13:50

this is the video i took this morning of the bad starting... it seems to me like its turning over ok and trying to fire up on one pot?

https://www.youtube.com/watch?v=Ubc-x4dOyT8

and this was the other morning

https://www.youtube.com/watch?v=f2W7vwAj8sI

Darlo 1 · Jan 5th, 2019, 16:59

Glow plugs?

Max HEADVROOM · Jan 5th, 2019, 17:01

Quote:

Originally Posted by Darlo 1

Glow plugs?

brand new.. plus its not been cold enough for them yet anyway

Brendan W · Jan 5th, 2019, 17:35

The line I take is pressure.

Leak back looks good. 10ml per min compares well with the rule of thumb 40ml.
Slow crank speed either from bad earth strap or lazy motor or tired battery.
My earth strap parted at the lug under the starter motor. Quite common.
Have you a reader to tell crank speed?
HP pump - hope not. Plenty to check out first.
Glo-plugs barely needed unless the temperature is below 7C.

Max HEADVROOM · Jan 5th, 2019, 17:39

Quote:

Originally Posted by Brendan W

The line I take is pressure.

Leak back looks good. 10ml per min compares well with the rule of thumb 40ml.
Slow crank speed either from bad earth strap or lazy motor or tired battery.
My earth strap parted at the lug under the starter motor. Quite common.
Have you a reader to tell crank speed?
HP pump - hope not. Plenty to check out first.
Glo-plugs barely needed unless the temperature is below 7C.

you mentioned the earth strap before and i mended it and thats why the cranking speed is good... battery's only about 5 months old too..

R-P · Jan 5th, 2019, 19:47

Quote:

Originally Posted by Brendan W

My earth strap parted at the lug under the starter motor. Quite common.

Why did I never read this before I experienced it myself

Max HEADVROOM · Jan 5th, 2019, 20:18

Quote:

Originally Posted by R-P

Why did I never read this before I experienced it myself

we live and learn pal lol..

Max HEADVROOM · Jan 7th, 2019, 13:30

and im still no further on

mrdave2003 · Jan 7th, 2019, 14:09

Do you have access to VIDA? I had the same issues on mine and used VIDA to live read the fuel pressure at the rail, this showed the pressure wasn't building high enough for it to fire.

Replaced in tank pump as that didn't work, and one injector (after doing the same as you) and 45K miles later its still going OK.

Does it turn over at the usual speed on the starter?

Jan 5th, 2019, 16:59	#3
Darlo 1 Lunatic. Last Online: Yesterday 22:27 Join Date: Dec 2006 Location: staffordshire	Glow plugs? __________________ V40 1.9D 2004 620 miles to the tankful. 235000 miles on clock. Now sold, S60 D5 2004. I vape therefore I am.

Jan 5th, 2019, 13:50	#2
Max HEADVROOM Senior Member Last Online: Jan 8th, 2022 15:01 Join Date: Dec 2016 Location: pontefract	this is the video i took this morning of the bad starting... it seems to me like its turning over ok and trying to fire up on one pot? https://www.youtube.com/watch?v=Ubc-x4dOyT8 and this was the other morning https://www.youtube.com/watch?v=f2W7vwAj8sI

Jan 5th, 2019, 17:35	#5
Brendan W Premier Member Last Online: Apr 2nd, 2024 19:50 Join Date: Dec 2007 Location: Wexford	The line I take is pressure. Leak back looks good. 10ml per min compares well with the rule of thumb 40ml. Slow crank speed either from bad earth strap or lazy motor or tired battery. My earth strap parted at the lug under the starter motor. Quite common. Have you a reader to tell crank speed? HP pump - hope not. Plenty to check out first. Glo-plugs barely needed unless the temperature is below 7C.

Jan 7th, 2019, 13:30	#9
Max HEADVROOM Senior Member Last Online: Jan 8th, 2022 15:01 Join Date: Dec 2016 Location: pontefract	and im still no further on

Jan 7th, 2019, 14:09	#10
mrdave2003 Premier Member Last Online: Apr 1st, 2024 11:08 Join Date: Feb 2007 Location: Sudbury (Suffolk) View Photos By: mrdave2003	Do you have access to VIDA? I had the same issues on mine and used VIDA to live read the fuel pressure at the rail, this showed the pressure wasn't building high enough for it to fire. Replaced in tank pump as that didn't work, and one injector (after doing the same as you) and 45K miles later its still going OK. Does it turn over at the usual speed on the starter?

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)