54 minutes ago, Nathan Buffery said:

Presumably, you'll get a display of the injectors, in Forscan, when you go to code your new injector.  So just go by that. I think you have replaced the right injector, as the original DTC was telling you what cylinder number the injector was at fault. 

It's only the display in Forscan of the injector numbers that is causing all the confusion. 

Oh.......and just si I can start saving......how much was the new injector?

It's not just the display in ForScan that was causing all the confusion though is it? The DTC was specifically stating cylinder no.3.

Everything I have read been told from multiple sources: Haynes / Ford parts lad / injector specialist tells me the cylinders are read from gear box end so the injector I changed should be cylinder2 whereas the DTC is referring to cylinder3. 

The injector was €180 +vat, that's a genuine new Continental one, not a re-man; came with washer and leak off o-ring, reused the white sleeve, clamp + bolt. 

1 hour ago, unofix said:

Other than the cost, is there a reason that you are not changing all four ?

All four injectors are presumably all the same age and therefore I'd expect that in the next 12 months you will have at least one more failure. Then you will have to go through this whole process again.

 

Main reason is the cost and 2nd reason is it's not that bad of a job, was pretty handy to be fair, injector came out easy. It's not my car, it's a family members but even if it was I still wouldn't change them all when they're not all buggered. As I can do the work myself, I'll just do them as they fail, otherwise you could put €800+ into it today only for the car to be wrote off in a crash tomorrow or traded in in 6 months. 

If it was going to be kept for ever or for another few years it might be justifyible to do them all, or if you had to pay a garage to do it then it might make sense to do them all at once, or even if it was on the road everyday doing high mileage it might make sense, but it only does small miles a year. At €180+ each and a straight-forward job to do, I think doing them as they fail is best strategy.

Some things I would do all at once, like glow plugs etc, etc... 

8 hours ago, Fordster1 said:

It's not just the display in ForScan that was causing all the confusion though is it? The DTC was specifically stating cylinder no.3.

Yeah your right there. 

€180+vat......better start putting notes in my piggy bank rather than coins!!! 

The car is running ok again now and I'm debating whether or not to enter the new injectors code via ForScan as it's running ok, I'm pondering if leave it be. It's just I've read of a few folk having running issues after programming in a new injector codes and not sure if it's worth the risk. What do you folks think, code or don't code??

I read the existing Injector codes via ForScan just to see if the code of the old injector I removed was no.3. And ForScan has the one I removed as being no.3. I have attached the picture. It looks as though ForScan is reading the injectors / cylinders just normal from left to right / belt to gear box and not from gear box to belt / right to left, so why does everything else state the opposite?

Am I correct in interpreting the attached diagram as reading the cylinders / injectors in the left to right formation, or am I mis-understanding it? 

If's it's left to right as I think, then this would explain why the injector I removed was the faulty one as it's no.3 from the belt end and no.3 was the fault code. So is Haynes / Diesel specialist / Ford parts lad people saying it's from the gear box end all wrong? 

 

So, I coded the new injector here this evening, ForScan said procedure completed successfully. 

Went to go for a test drive and the car was jumping and rattling and I nearly couldn't get it out of 1st gear with the jumpiness (mis-firing or knocking?)

Anyway, I stayed driving and it came good as in driving ok, jumping went out of it, but there's still a rattle noise low down in 1st and 2nd. What would that be, does it take a while for the Ecu / Injector to bed in after coding or such?

What does diesel knocking sound like, is it like a rattle?

26 minutes ago, Fordster1 said:

What does diesel knocking sound like, is it like a rattle?

ever heard the sound of a London Taxi ?

On 4/9/2022 at 6:52 PM, Fordster1 said:

Hi peeps, hoping some advice can help me.

2012 mk3 focus 1.6L diesel model. Engine is running rough / mis-firing, engine management light came on, I checked and cleared the fault codes with my ForScan and the EML cleared but the car was still undriveable as still mis-firing.

Fault code = P1263 - Cycl3 High to Low Side Short

I checked the little bit of wiring (visually) directly at the injector and the connector itself and there's no obvious problem there.

I went ahead and removed the injector, came out easy enough, and it looks ok there too, as in it's clean, no carbon build up or such. Am I correct in believing injector 3 is the 3rd one from the timing belt side with the one closest to the timing belt side being no.1.  From searcing / reading this forum there seems to be a little bit of controversy regarding Ford having used different ways of referring to the position no. of injectors on some of these engines?

My plan now is to get the injector checked with a local diesel specialist, I'm hoping they'll be able to test it for electrical faults within it?

Anyone got any other things I should / could check? To check the wiring where do the 2 injector wires go, I'm assuming directly back to the Ecu, is it worthwhile or straight forward (access wise to Ecu) to test these for continuity using my multi-meter? 

Does ForScan show the live data of the injectors, is there anything I could check there to help me? I can refit the injector if required.

Generally speaking, from the experience of other members here, would ye think this is a problem with the injector or with its wiring?

Also, probably a red herring, but the traction stability control light is on the dash too, car owner thinks came on at same time as the mis-firing, I can't seem to be able to clear this with ForScan, it comes back straight away. Is there any posibility this is related to the injector or am I correct in thinking there's 2 separate independent problems.

Have you texted the injector out of the car to see if it clicks

Diesel knock is caused by the explosion happening too early.  It's effectively like whacking the piston with a hammer while it's still on the way up, and is higher pitched and more 'rattly' than the word knock implies.  (Especially considering the deep noise a big-end knock makes!)  Diesels all knock a bit, especially when cold, so you will have heard it before, I'd say 'clattery' is probably the best description.

Just to update, I brought the car for a good spin and done the let it hit 3000 revs and let it drop down itself to lower revs that I read of. Not sur eif that helped or just the fact it was brought for a good spin but she's running 100% again now.

Very werid the way it went dodgey after coding the injector, maybe it just needs to bed in and re-learn or something but modern stuff certainly knows how to test your wits haha. 

Thanks to all for the help / advice. :)

I have a similair issue. High to low side short cyl 1. Car ran on 3 cylinders after a hard pull upto 80mph, limped home and clearing the code immediately brought it back. After many attempts it stayed off, but i was squeezing the loom at the same time whule someone kept pressing reset. 100 miles later it does it again. Cleared code, ran ok until i booted it, came back, high to low side short cyl 1. Removal of injector plug confirms cylinder is dead, now code will clear but its still running rough, not down to 3, very but rough, moving loom around does nothing now, had loom apart upto diesel filter plug, all fine, not sure if its loom or injector.. any pointers for me before i swap injector 1 and 2 around to see if the fault follows the injector or stays on cyl 1 ? Thanks folks.