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[STEMO]

I used to like the scrappers when you could fill your pockets with all manner of car parts and some deranged old scrapper with a mentally unstable dog would say 'Gis a quid mate'

Those days seem long gone.

And long gone are the days when you needed to visit a scrapper.

[Andy B]

A bloke at work needed a new injector for his Golf. It'd have been about £500 if the dealers had done it for him 

[Field Marshal Dr. Opti]

I used to like the scrappers when you could fill your pockets with all manner of car parts and some deranged old scrapper with a mentally unstable dog would say 'Gis a quid mate'

Those days seem long gone.

And long gone are the days when you needed to visit a scrapper.

Several decades at a guess, but you take my point.

[VXL V6]

Start with a code read as you say James 
common issues include the alternator clutch ,blowing exhaust flexi,leak off pipes,vac leaks etc
 fuel filter never being replaced 
had 1 with no codes playing up and it finally threw a code for crank sensor ,replaced and been fine since
don't have any on the fleet with DPFs sorry

...and EGR Valves, not common but they do seem to have a failure age / mileage point and cleaning them is only every a temporary fix.

[dave the builder]

Start with a code read as you say James 
common issues include the alternator clutch ,blowing exhaust flexi,leak off pipes,vac leaks etc
 fuel filter never being replaced 
had 1 with no codes playing up and it finally threw a code for crank sensor ,replaced and been fine since
don't have any on the fleet with DPFs sorry

...and EGR Valves, not common but they do seem to have a failure age / mileage point and cleaning them is only every a temporary fix.

yes , i think that's true of any EGR valve on any model car though
our highest mile diesel is only 110 K so not had EGR issues on either 1.7 CDTi yet 

[Sir Tigger KC]

I used to like the scrappers when you could fill your pockets with all manner of car parts and some deranged old scrapper with a mentally unstable dog would say 'Gis a quid mate'

Those days seem long gone.

And long gone are the days when you needed to visit a scrapper.

I don't know.....                    He has a Signum.

[STEMO]

I used to like the scrappers when you could fill your pockets with all manner of car parts and some deranged old scrapper with a mentally unstable dog would say 'Gis a quid mate'

Those days seem long gone.

And long gone are the days when you needed to visit a scrapper.

I don't know.....                    He has a Signum.

He doesn't drive it though. He's under the illusion that it's an appreciating classic. It is, after all, the desirable 2.8.

[Sir Tigger KC]

I used to like the scrappers when you could fill your pockets with all manner of car parts and some deranged old scrapper with a mentally unstable dog would say 'Gis a quid mate'

Those days seem long gone.

And long gone are the days when you needed to visit a scrapper.

I don't know.....                    He has a Signum.

He doesn't drive it though. He's under the illusion that it's an appreciating classic. It is, after all, the desirable 2.8.

It's probably feked and he needs to go to the local scrappy for some parts.   

[dave the builder]

I used to like the scrappers when you could fill your pockets with all manner of car parts and some deranged old scrapper with a mentally unstable dog would say 'Gis a quid mate'

Those days seem long gone.

And long gone are the days when you needed to visit a scrapper.

I don't know.....                    He has a Signum.

He doesn't drive it though. He's under the illusion that it's an appreciating classic. It is, after all, the desirable 2.8.

It's probably feked and heUGLY , needs to go to the local scrappy for some parts.   

Less is more Sir Tig 

[Field Marshal Dr. Opti]

I suppose a lot of people are envious of the mighty Signum.

[STEMO]

I suppose a lot of people are envious of the mighty Signum.

A lot of people may be envious of any car that's running soon.

[JamesV6CDX]

Well I've had a look at it, just going for a shower (I hate working on deisels!!!) and then I'll post up, with a couple of youtube vids

[JamesV6CDX]

Ok so I had a look at the beast today.

The first thing I did, was tighten up the downpipe to turbo joint. I remember when the car drove off the truck, there was a massive exhaust blow. I thought "That won't be helping things". Looking underneath, the nuts holding on the downpipe were all undone several turns, so the downpipe was sat about 0.5cm from the flange.

I nipped up the nuts, and thought "that will sound better".

I started her up, and heard this:

https://youtu.be/ds5FDkRa-Bo

Yes, a very loud, strange, unpleasant noise!

So I loosened the downpipe again, and the noise went away.

So there's clearly a massive issue (blockage) with the exhaust / cat / DPF? My question is, why!

It's led me to think - with the engine also unning on around 2.5 cylinders, has something (the turbo?) massively let go, and jammed the exhaust / hit the valve seats with shrapnel?

Or, maybe the car has been ran for some time with a misfire, which has slowly blocked the DPF?

When I removed the exhaust, (much to the neighbours delight I'm sure) it ran like this:

https://youtu.be/jC-bxxr_lNI

The nasty noise gone, but still misfiring.  You can also see in the video, there's no change when no2 and 4 injector plugs are removed.

I've changed the No4 for a known good injector, but the issue remains the same.

I'm guessing next stage is a compression test, and maybe take the pipe off the turbo and see if I can see if It's in one peice!

Any advice gratefully received.

No fault codes stored at all in the Engine ECU. Although interestingly, with my tool that cannot be named, it connects, identifies the VIN etc, and will read and reset codes, but all of the live-data and programming options don't work. Wonder if it's a version issue. At the moment, I don't know how much it's been played around with, and if the correct injectors are coded to the ECU.

It looks like the rocker cover has been off not that long ago, so not sure I buy the guys story about breaking down and the AA coming out, and not attempting any sort of fix first. That said he's not a trader - it's been in his name for 5 years or so.

Any tips gratefully received on where to go from here.

[JamesV6CDX]

Hmmm I also wonder if these have swirl flaps that can Ingest into the valves ....

[dave the builder]

does the code reader say what engine code it is ?
select the wrong engine code and "code reader" acts the way you describe
something is amiss with reading the data ,it should detect missfires etc
try a full module scan,vehicle identity , introduce faults (disconnect something) and see if it registers as a DTC
I'd remove the air intake pipe to turbo and have a wiggle inside (be careful ,there may be sharp edges )
as the rocker cover has been off previously, may be worth a peak
also can't rule out timing belt slip etc (seized tensioner roller) ,snapped cam or similar catastrophic fail