MK5 Golf 170 BHP, INJECTOR PROBLEM

[BmwE30kieran]

I’ve got a mk5 golf 170bhp BMN ENGINE diesel DSG.
I have a problem that I can not seem to get solved.
The car starts when I unplug no.4 injector, soon as I plug it back in…the car will not start. If I unplug any of the other injectors it does not start, only no.4 unplugged?

I went to the local scrap yard and brought 3 injectors, that all have the same part number. I have tried them all in no.4 and it does the same with all of them. I have to have it unplugged for the car to run.

I have tried the wiring harness under the rocker cover.
I have also checked continuity, from the injector harness plug to the ECU there seems to be no broken wires.

Any help would be much appreciated.

thanks I’m advance.

[mickeybo]

check the insulation on the no 4 plug with ign 0ff

[Crasher]

This was actually the cause of a recall with the BMN injectors and new ones are now impossible to find, even recon are scarce… I think Bosch and VAG want the BMN engines out of circulation.

[Jon44w]

Why did you buy 3 injectors when you only need 1? Did you try switching (ignoring the scrapyard ones) injector 3 (which you know is good and works) into number 4? If 3 worked fine before but not in 4 then that would rule out injector problem as your issue. Did you drive long on a bad injector? Ive seen people damage heads driving on bad injectors for too long. Did you get any injector readings from vcds etc to see what they are doing?