Thread: 2012 BT50 5 cylinder TDCI - catastrophe!!!

So my assumption is we have a major injector leak
But
How can that much fuel get to the exhaust such that it fills the can and find a pin hole at the seam and leaks out

Must be huge volume passing through the system ???

I can’t for the life of me think any other way diesel is flooding the exhaust except via an injector


Oh - fuel rail pressure when running is in normal limits
But when cranking is a little low 8Mpa cranking

One YouTube video found that a leaking pressure relief valve can cause failure to start and was due to failed fuel rail pressure relief

But this is different as it has a metric **** tonne of diesel going through the engine???


Any ideas on next steps ?

Do I disconnect one injector at a time and block off its high pressure supply and run it briefly to find the culprit?

Thoughts?

I have a video of the palaver if someone wants it
Too big to upload

Does it have a DPF?
If so does it have a 6th injector in the exhaust to do the regen burn?

That much fuel in one cylinder would just about hydro lock the motor wouldn't it?

Tony

If you have any access to a Forscan program you could find the injector corrections ( a la TD5) which should give you a clue as to which it is. The Forscan OBD dongle is pretty cheap and you need a laptop.
I have the gear but have never used it as my OBD Australia stuff seems to read all I need as it has the PIDs for engine, transmission and exhaust temp.
I have seen this before on the Everest site but not as common as EGR cooler failure or glow plug failure (not extended warranty) which is now warranted by Ford for 10 years.
Regards PhilipA

Tony that is some interesting details

I’ll need to do some looking

There is an enlarged section after the turbo dump but I can’t see any fuel running to it

I too couldn’t work out how that much raw diesel wouldn’t hydro the engine

Thanks for the lead…

I have a generic (high end) OBD reader from another fella on the island
It can check/ clear codes and run real time diagnostics ( which is how I check fuel rail pressures )
But unfortunately does not give individual injector trim details

Thanks for any and all ideas

S

Thanks for DPF tipoff
Now that makes much more sense
this video shows the fuel supply system to the DPF
https://www.youtube.com/watch?v=s6cOibLFFwI

To get that much fuel into the system surely must be coming from this route.
I wonder if the exhaust is now essentially blocked and back pressure is why it won't start????

Will go check the vehicle and investigate but at least this seems to be a reasonsbale reason for litres of fuel pouring out the can !

uuurgh
No good deed goes unpunished - all I did was help change a stinking fuel filter!!!!

They did not get dpf until October 2016. They have a habit of blowing a hole through the top of no 3 piston, if you take out all the injectors and have someone turn the engine over for a couple of seconds and see which one doesn't blow out pressure you will have the answer.

Originally Posted by sharmy

They did not get dpf until October 2016. They have a habit of blowing a hole through the top of no 3 piston, if you take out all the injectors and have someone turn the engine over for a couple of seconds and see which one doesn't blow out pressure you will have the answer.

Thanks Sharma - Ill double check on the DPF situation in a moment
I had heard about the blowing of pistons

But if blown piston is the case:

shouldn't there be diesel fuel washing into the sump (none I can see using the paper trick - not definitive I know but allegedly good rough test)

and there wouldn't be a **** tonne of diesel fuel getting into the exhaust pipe.

Will report back with findings - current theory is the DPF injector has failed and is pouring fuel into the DPF which is now so blocked that the back pressure is preventing starting?
Maybe

Ah well
DPF ideas off the card
Engine is 2013 manufacture
Has a Cat but NO DPF

Can see diesel seeping from all exhaust joints

Must be lots shipping through the engine

Sooo
Bush mechanic checks

Block each injector one by one and see which is the problem ?

Or pop them all out and see how it turns over ?