VWT6 CXEB NON START After rebuild (2017)

[mmi]

do we think that the 5.3’ is enough for it to not fire ?

As the main injection duration gives nonzero values I believe it's not the issue - ECU is firing the injectors.


There was a case where the "Camshaft adaptation..." value was above 6 degrees - then ECU didn't fire the injectors at all (below)

Post in thread 'Won’t start [Resolved]'

2 Aug 2021

I have downloaded the files you requested. I'm now going to remove battery and check fuses/relays etc as there was this burning smell that I presumed was the egr pipe but would be good if it's a melted relay.
Thanks to
mmi and Dellmassive

Thanks- indeed strange.
Have you scanned for the faults again after all the cranking? Directly under Engine - Fault Codes?
The last bits of data are under Engine - Advanced ID. Perhaps you could do that too?

Nothing obvious in the blockmap file - these two are interesting (and different to mine). Something "sporadic" was recorded starting...

• mmi

• 

Have you tried with the old injectors - just in case?

 

[Hughes72]

Yeah ok but do you think it could be that the injectors are firing but the valve timing being out is stopping it running if it has spun the cams ? Or do you think it would still run at 5’ out? just can’t work out if the pistons haven’t touched the valves why it would show 5.3’ out on a new engine, I have tried with the old injectors as well and didn’t make any difference. Van was sat for a few months so may be worth draining fuel system and putting new diesel in. Is there anything else I could check/monitor you think it could possibly be ? Thanks

 

[DXX]

Yeah ok but do you think it could be that the injectors are firing but the valve timing being out is stopping it running if it has spun the cams ? Or do you think it would still run at 5’ out? just can’t work out if the pistons haven’t touched the valves why it would show 5.3’ out on a new engine, I have tried with the old injectors as well and didn’t make any difference. Van was sat for a few months so may be worth draining fuel system and putting new diesel in. Is there anything else I could check/monitor you think it could possibly be ? Thanks

Your first post said it was a new long block? Surely that’s new camshaft ass’y and head included?

 

[Hughes72]

Your first post said it was a new long block? Surely that’s new camshaft ass’y and head included?

Still not starting, Have an update, The crank snapped on the old engine and ruined the bottom pulley, I had one that I put on the new engine as I thought they were all the same on euro 6 (turns out there not will update with part numbers) Checked my camshaft timing phase position and it’s at 5.3’ doesn’t change at all while cranking, Fitted correct crank pulley and timed up again no difference, Took camcover off to check cams, visibly all ok but looked down injector holes and crank was 360 out ! 2&3 at the top. Timed up correctly now but still not firing, Cam still visibly looks in the correct positions but do we think that the 5.3’ is enough for it to not fire ?. May need a new cam box.

View attachment 312000

Yeah new head/camshaft and injectors. Did you see my previous message ? I’ve attached it, crank was 360 out and had the wrong crank pulley hence why I’m querying the camshaft timing. Just can’t get it to run can’t figure it out, no fault codes, that camshaft phase position is the only thing out the ordinary I can find.

 

[DXX]

Yeah new head/camshaft and injectors. Did you see my previous message ? I’ve attached it, crank was 360 out and had the wrong crank pulley hence why I’m querying the camshaft timing. Just can’t get it to run can’t figure it out, no fault codes, that camshaft phase position is the only thing out the ordinary I can find.

Ah OK, I would think the valves would bend before the pressed cam lobes twist, from memory the cam case / followers break if the valves hit the pistons, at least when the engine is running.
A compression test would show any bent valves and prove that you have enough compression for ignition.

 

[mmi]

Is there anything else I could check/monitor you think it could possibly be ?

I think we have covered in the data everything related. The key thing being "main injection duration" at 1000...3000 us range a kind of suggests the ECU thinks everything is fine. Surely it was at zero before cranking??
Certainly the 5.3 degrees isn't exactly what to expect - so possibly a mechanical issue indeed?

• cranking speed is good - enough for the ECU to fire injectors
• engine gets enough air - air mass 5.37 g/s
• fuel pressure is 300 bars - good enough for the ECU to fire injectors
• main injection duration is nonzero - indicating that ECU is indeed firing the injectors

Yeah it starts with starter fluid

Obviously there is good enough compression.

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Any diesel smell when cranking?
Can you crank the engine an injector upside down (below)?

K

Thread 'T6 wont start'

20 May 2024

Hi

Some tip here?

T6 2017 / transporter / multivan want start.

150000 km.
36000kpa on fuelrail.
Injectors not fires of / no diesel ouf of them.

Does someone had the same problem?



Drove long distance, then it started running on 3 cylinders then 2 cylinders and stopped completely. The OEM dealer claims no error codes when scanning. They deleted codes and now I don't get any error codes when scanning with icarsoft. I get the fuel rail up and it shows 36,000 kpa when cracking. A lot of diesel comes out when I loosen the injector pipe. I took out all the nozzles and turned...

• Kenem
• Replies: 7
• Forum: Engine, Gearbox, Exhaust, Drivetrain

 

[DXX]

When you replaced the crankshaft pulley are you sure the key / keyways were intact and a good fit?
Starter fluid has a lower flash point than diesel so it will start with lower compression.

 

[Hughes72]

Thought I’d come back and give everyone an update. The only things it could be after testing everything was fuel or compression related. Cam values read ok after correct crank pulley fitted. Tried old injectors, still didn’t work, Turned new injectors upside down and there was no firing while cranking, Took them to get tested and took the tips off to find them full of swarf ! I cleaned the fuel system incase when I changed the engine as it had sat a while but suspect the pump was on its way out and when I first fired it up it pushed the swarf straight in which is why it makes sense that it run for a few seconds on the first start. Managed to get 3 of them cleaned and working, cylinder 1 injector no good. High pressure pump and 1 injector later and we have a running van ! (Kind of) Straight into limp mode BiTDI Turbo failed vains seized on the small turbo usual rubbish haha, New turbo and empty pockets but she’s alive. Cheers! Happy new year!