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.

1 hour ago, Fordster1 said:

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. 

I'm not sure if the below link will work, but if it does, it looks like Forscan displays a page which shows you the cylinder numbers in relation to the gearbox. However, I'm not sure how to access this page and the picture is from a 2.0 Mondeo. 

https://imgbb.com/WD5xqbZ/img

Cheers for the reply but unfortunately that pic link doesn't open for me, but thanks for telling me there is a way to check the injector order within ForScan, I'll try search where exactly that option is.

 

Does anyone else have any experience with this issue? 

@ unofix - That pic you posted would suggest the injectors are read in the order of position from the gear box end. So I have removed the wrong injector if that illustration is relevant to the car I'm working on. I notice it says Mondeo 2.0L Duratorq engine? Do you think that engine would be the same injector ordering as my 1.6L Focus?

Can anyone tell me, is it possible to check the injector itself for resistance or ohms and what values I should get? 

And also how do I check continuity of the injector, where are the ends of the 2 injector wires, at the Ecu connector plug are they?

https://forscan.org/forum/viewtopic.php?t=2

unofix - Lol, That's different yet again. That's 3 different possibilities, 1 - 4 reading from belt end, 1 - 4 reading from gear box end and now reading by firing order. The Focus I'm working on is a TDCI engine as far as I know. Not a DuraTorq.

Can anyone tell me, is it possible to check the injector itself for resistance or ohms and what values I should get? 

And also how do I check continuity of the injector, where are the ends of the 2 injector wires, at the Ecu connector plug are they?

Looking at the wiring diagram for the DV6C it states 'PSA numbering definition. Cyl 1 is on the Flywheel side' 

I'm not sure if this is your engine type. It shows the wires as Violet/Grey and Green/Violet going to injector 3. These wires go back to the ECM and are connection numbers 11 and 12 on connector 'C'. 

I think it would be tricky to trace these back to the ECM but you could certainly see if the wire colours match on the injector you've removed.

 

 

Cylinder numbers and Injector numbers are not the same thing.

The wire colours of the injector I removed are a solid brown and a brown / green I think. One of the injectors beside it also has a solid brown wire. 

According to the wiring diagrams in the link on this forum the wire colours for injector 3 should be GN / VT and VT / GY. Obviously these don't match what I am thinking is injector 3 counting from belt side. 

Here's the forum link to the wiring. 

 

That's the injector wiring I can find in the wiring manual linked to in the sticky post at the top of this forum.

 

The colours of the wires on my actual car are going from timing belt side to gear box side are:

Black + Brown

Brown + Purple (violet)

Brown / Green + Blue / Brown

Brown / Black + Brown / Blue (These 2 wires on this injector here are hard to say what colours they are)

I think we have the same wiring diagram, but looking at different engines. The one you have shown above is the Sigma engine (which I thought was a petrol engine).

If you scroll down, I was looking at the DV6C engine. 

Having said all this, I have nipped out to my car that definitely has the DV6C engine in it and, like you, none of the wires match the wiring diagram!! 

So I had a great idea.....I'll take the plug off one of the injectors, start the car and see what DTC it throws up. So I took the plug off No. 3 cylinder from timing belt end. The DTC came up as injector cylinder 3 open circuit!!! Unfortunately, I dont think this helps.

The other idea I had was to read the codes that Forscan gives me for my injectors and see where they are in relation to this. Unfortunately, the little one has run the battery down on the laptop, so I didnt want to take a chance.

So if the Sigma is the petrol engine, it appears the linked wiring diagrams in the sticky thread doesn't cover the 1.6L diesel engine?

Where can I get a wiring diagram for it, or what engine code is the car even? A DV6C I assume if your's is a 2013 1.6L Mk3 as in your username info.

Cheers for taking the time to try and check via your ForScan an looking at your actual car. :) 

Maybe the diesel injector specialist place will be able to tell me the firing order / cyclinder order and possibly have wiring diagrams.

On one parts website when I put the reg in it asks me to pick between either 1 of 2 options for my engine code; either T1DA or T1DB? Hmmm, does this mean this car doesn't have a DV6C?

There should be stickers on the cam cover which tell you your engine code. 

I have used this wiring diagram quite a few times now for the various modifications I've done on my car and apart from the odd wire colour, it's been pretty spot on. I did take a few pictures of the wires and now when I look at them zoomed in, it's hard to tell the colours on them, especially as they been baked, oiled and dusted with engine heat and fumes!

Normally with that code it's the injector at fault. 

Iantt - What engine is that diagram you posted for? It doesn't match my injector wiring colours.

My engine is either a T1DA or a T1DB as far as I can make out.

I see Haynes do a manual for this particular Focus but in my experience their wiring diagrams are notoriously crap so I wouldn't be surprised if the injector wiring is either not in it or it's different to what I actually have.

It's off 2012 1.6tdci. if the colours are wrong, then ford can't even get the wiring diagrams right. 

11 hours ago, Fordster1 said:

My engine is either a T1DA or a T1DB as far as I can make out.

Are there a couple more stickers on your timing belt cover? Mine says the same as in T1DB but a bit further down is a sticker with a barcode which has DV6C on it. 

 

DV6C is the engine family - used in many different makes & models.  The T1DA/B is the Ford specific engine code.

7 hours ago, TomsFocus said:

DV6C is the engine family - used in many different makes & models.  The T1DA/B is the Ford specific engine code.

I thought it was the other way round!! Ha ha, every day is a school day.

Does anyone know what the difference is between the engine codes T1DA + T1DB out of interest?

TecDoc tells me it's either a T1DA or a T1DB. All the stickers seem to be gone off of this engine cover, timing covers, etc on this car...

I bought the Haynes manual, it's handy for the torque setting of the injector bolt but as suspected it doesn't even have an injector wiring diagram yet alone an incorrect / hard to understand one. Haha. The Haynes also states that the no.1 cylinder location is at the transmission end of the block.  

Anyway, I brought the injector I had removed along to the diesel specialist and it read 10 (I don't know the unit of measurement; ohms probably?) on his Bosch injector metre (wasn't just a multimeter). He said this was completely buggered, think he said anything under 40 is dead, and under 100 hasn't much life yet and that a healthy one reads 190 approx. 

I got a new injector off of him too, just fitted it here now and brought the car for a spin, it seems to be fine, although the EML is on and I haven't coded in the new injector yet. I'm going to scan the car now after my dinner and check what the EML is saying. 

Can anyone tell me if a new injector is not coded to the car and there are no other issues, will an un-coded injector bring on the EML?

I also noticed the traction light has disappeared now too, still not 100% sure if that's related to this issue or not?

It's werid, cause I put the new injector in cylinder 2 if counting from the gear box end and in cylinder 3 from the belt end. The fault code was cylinder 3. Yet it seems to have fixed the problem. So does this mean I have 2 faulty injectors, cyclinder 3 from gear box end might be starting to act up too, but you'd imagine the one causing the mis-fire would be the one bringing up a fault code? Hmmmmm....

 

Ok, so I just scanned the car now and the EML was just the old P1263 - cylinder 3 high to low side fault so I guess I just needed to clear that after fitting the new injector. EML cleared off ok and I brought it for a spin, driving fine and EML has stayed off. I have answered my own question in my previous post now, an un-coded new injector physically installed doesn't bring on the EML light.

So, how did re-newing cylinder no.2 injector (gear box side) fix the car when the fault code was for cylinder no.3?

Also, could the bad mis-firing shaking the engine / sun-visor even shaking, have caused the traction stability light to come on the dash, or is this just coincidence that it's light has gone now too. Seemed to have come on at same time as EML according to the owner but not 100% sure.

Anyone, got any thoughts on this? 

Ford dealer parts lad told me I'd end up changing all 4 injectors, common problem, hmmm.

2 hours ago, Fordster1 said:

Ford dealer parts lad told me I'd end up changing all 4 injectors,

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.

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?