Leak off test?

[badboydas]

Hi all
Have read of different ways of performing leak of test, but none seem to be definitive. Can someone who knows (Not Thinks they know) confirm how to perform a leak off test correctly?
Also should there be air in the return flow?

[liteace]

............ but none seem to be definitive. Can someone who knows (Not Thinks they know) confirm how to perform a leak off test correctly?

Correctly = plug in VCM, run IDS, follow on screen instructions, let test run (automatically) then compare the amount of diesel in the bottles to what the IDS screen says

[badboydas]

Thank you liteace
But not everyone has VDS. My question is for the likes of myself, call me tight . But the ford Wiki indicates a 5 minute test, but most on the internet say 3 minute. The difference between 3 and 5 minutes will make all the difference. Yes I did ask for definitive and I am sure you are giving a definitive answer. I will change my question, given that most of the posters and non posters are DIY`ers, what would be a relative test given we would already have the return tube blocked of the return pipes and connected bottles that can show the the difference between injectors?

[liteace]

No idea because when the IDS runs the self test it will automatically control engine speed / time until the test is finished, I'm sure there are other ways you can test but Fords built it this way and that's the way they test it!

[Ml Autos]

Leak off test is performed at cranking speed (10-15 sec.) with injectors unplugged and return pipe blocked with a clamp. A leaking injector will show itself straight away. It will fill the bottle in seconds. Never heard about 3 or 5 min test:)
Leak of test at idle should confirm the cranking test.

[badboydas]

This is 5 minute way http://www.fordwiki.co.uk/index.php?tit ... k-Off_Test then there is another way which is only 3 minutes, 2 minutes at idle then 3 5 second burst upto 3000rpm. Niether compares to the other, this why I wanted something definitive
Cheers the cranking test with injectors unplugged and return tubes blocked crank 10 - 15 seconds. I had heard of this test but not had all the details.
cheers To both of you for your help

[Ml Autos]

From my experience with Transit Connect if injector is leaking youll be able to see it straight away)) good luck