Injector leak off test

[minishep]

Hey guys and girls, long time lurker first time poster. I i have a 2004 Transit 135 T350 van and have been getting the dreaded miscelanious fuel system error code. The local ford dealer pretty much told me to scrap it but im a tight ass and like tinkering....

Have just performed the injector leak off test results are as follows
Cyl 1 7ml
Cyl 2 2ml
Cyl 3 4ml
Cyl 4 4ml

My question is number 1 is clearly stuffed but what would cause number 2 to be so low?

Love to hear your thoughts


Minishep

Wagga wagga
Australia

[winterheating]

Low is good, but not zero.

If you have TIS it tells you the calculation to use.

It’s something along the lines of, work out the average of the 3 lower ones, so say 3ml. Then multiply by a number, say 2.5, so that’s 7.5ml, meaning a maximum allowance for the highest flow permissible.

It also explains how just re entering/ learning the injector correction factors can have an influence in leak through rates.

Dont scrap it sell it to me

[wojciech]

Have just performed the injector leak off test results are as follows
Cyl 1 7ml
Cyl 2 2ml
Cyl 3 4ml
Cyl 4 4ml

My question is number 1 is clearly stuffed but what would cause number 2 to be so low?

Love to hear your thoughts


Minishep

Wagga wagga
Australia

The first time I see leak off test results as above... What time and what kind of test was done? (Delphi fuel system).
Self-made test, four minutes, only idle - result lower than 35-40 ml is ok.
Test using IDS (during this test engine works twise some seconds 3.000 rpm) result lower than 45 ml are ok. Once I had result more than 100 ml with one injector (rest 20-35 ml), but pump was fresh from regeneration and there were no problems with errors (P0251/P1211).