Td5 injectors staying open

**Chanoo** · 10th May 2018, 11:58 AM

Hi what would be the cause of the injectors staying open on a td5.
Have just replaced the head ( which was cracked) and now have the injectors staying open dumping fuel, is the a trick or procedure I'm missing?
Cheers

**djam1** · 10th May 2018, 12:03 PM

Are the copper washers between the injectors and head leaking?
What makes you think they are open
TD5 injector failure is rare all of them failing after a head replacement smells like assembly error

**AK83** · 11th May 2018, 03:05 PM

Injector rocker clearances?

**djam1** · 12th May 2018, 09:06 AM

I am not sure if bump stop adjustments would cause them to be open all the time as they have an electrical operated piezo

**strangy** · 12th May 2018, 09:12 AM

Injectors are electronic activated.
If “they” (all of them) are open your ECU is stuffed.
My opinion is this is highly unlikely.
I think some more definitive investigation and diagnosis is required.
A Nanocom can test “activate” individual injectors for a starting point to further investigation.
Most likely issue following normal function from a head change is damaged injectors from mishandling, incorrect o rings fitted or fitment of the o rings is incorrect.
I’m not a gambling man but I’d bet a fair sum all injectors are not “open”
Copper washers seal the combustion gases and o rings seal the injector to the fuel gallery.

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