Kristoffer Andersen
Member
Did run the supply pump 3 times 60 seconds to fill the hpfp before trying to start, and bleeded the injectors without the plug connected befor i tried to start..
Start problem vw t6 CXHA
- Thread starter Kristoffer Andersen
- Start date
Kristoffer Andersen
Member
Here is the logs i made now
I thought you had two new injectors installed with the old HPFP.
Kristoffer Andersen
Member
Thats right.. two new was with the old pump.. but how can i clean them without buy new ones?
It was bearly spoon in the commonrail, so i was hoping they would make it..
It was bearly spoon in the commonrail, so i was hoping they would make it..
You can’t but if the leak oil from those two injectors is contaminated it will flow back to the rest of the system.
Kristoffer Andersen
Member
Todays log.. Fuel pressure looks good to me, but still no start.. Air lock in the new injectors?
Yes, fuel pressure is good and builds up immediately. Also injectors are commanded to fire immediately (green line).
You did run the lift pump to bleed filter, HPFP and injectors (keeping fuel lines into them connected)?
Finally at 6 years VW agreed to replace fuel filter. VW garage tool ODIS uses the procedures below to bleed the new filter.
That's all - start the engine - it starts up immediately - check for leaks
Fuel filter bleeding
(1) Run the pump for 60 seconds:
VCDS > Select > Engine > Basic Settings > IDE00459-Test of transfer fuel pump
(2) followed by 30 seconds of cyclic run of the pump
VCDS >Select > Engine > Output test > Fuel pump electronics
That's all - start the engine - it starts up immediately - check for leaks
Any update?
@Kristoffer Andersen
@Kristoffer Andersen
Kristoffer Andersen
Member
On my way home from vacation now. Have 4 new injectors ordered from Germany waiting for me.
Will put them in tomorrow and hopefully it starts right up
Will put them in tomorrow and hopefully it starts right up
Kristoffer Andersen
Member
Engine > Security Access-16 (the code should show up by hovering mouse) Do it! > Adaptation-10 >...
(possibly 11463, or 27971)
Kristoffer Andersen
Member
Hi everybody 
I have same the problem, can anyone help me analyze attached file?
I removed fuel rail and pipes to replace a glow plug on my T6, CXHA engine. Did proper bleeding according to manual, the car started and ran for 5-10 seconds, then died.
It seems to me that everything is as it should, except pressure maybe building a bit late?
I have same the problem, can anyone help me analyze attached file?
I removed fuel rail and pipes to replace a glow plug on my T6, CXHA engine. Did proper bleeding according to manual, the car started and ran for 5-10 seconds, then died.
It seems to me that everything is as it should, except pressure maybe building a bit late?
True. In the log took 1.7 seconds to reach 200 bars GREEN - when also injectors are commanded to fire (main injection GREEN).
Based on the log it seems that engine does not get enough air (air mass RED) - this alone would prevent engine to start
Please make a log with slightly modified setup - to verify throttle flap operation
IDE00021 Engine speed
IDE00347 Air mass: actual value:
IDE00352 Main injection: duration of activation
IDE00407 Rail pressure regulation: status
IDE03767 Engine status
IDE05632 Fuel pressure regulator valve actual value
IDE05633 Valve for fuel metering: feedback value measured
IDE07771 Throttl.valve adapt. 1 bank 1: posit feedback - Actual value
IDE07818 Fuel high pressure sensor: actual value
IDE07819 Fuel high pressure sensor: unconditioned voltage
IDE07821 Fuel metering valve: activation
IDE07822 Fuel pressure regulator valve: activation
For comparison please see below
True. In the log took 1.7 seconds to reach 200 bars GREEN - when also injectors are commanded to fire (main injection GREEN).
Based on the log it seems that engine does not get enough air (air mass RED) - this alone would prevent engine to start
View attachment 311702
Please make a log with slightly modified setup - to verify throttle flap operation
IDE00021 Engine speedIDE00347 Air mass: actual value:IDE00352 Main injection: duration of activationIDE00407 Rail pressure regulation: statusIDE03767 Engine statusIDE05632 Fuel pressure regulator valve actual valueIDE05633 Valve for fuel metering: feedback value measuredIDE07771 Throttl.valve adapt. 1 bank 1: posit feedback - Actual valueIDE07818 Fuel high pressure sensor: actual valueIDE07819 Fuel high pressure sensor: unconditioned voltageIDE07821 Fuel metering valve: activationIDE07822 Fuel pressure regulator valve: activationIDE07824 Tank-internal presupply pump 1 bank 1: activation
For comparison please see below
Hi, and thank you for responding so quickly
I will make a new log file tomorrow with the requested setup.
Good morning.
Here is a new scan including IDE07771.
After standing over night it took 8 sec before fuel pressure building up, but it seems like throttle valve remains open and air mass pulsing between 2,5 to well above 4 g/s
If it matters, I have also replaced EGR valve and timing belt, but I'm not sure if this have any impact on the case. Timing belt double checked for correct installation, and the car started on first attempt and was running fine for 5-10 sec.
I'm also attaching full system scan and blockmap ignition on if it can be of any help. I have a DPF malfunction, (probably because of previous EGR malfunction?) strange thing is that date is saying 2106.01.01, not sure why, other error codes have had correct date and year.
Also in blockmap, IDE00385 have different value than the other injectors if that matters.
I hope you can lead me in the right direction here, because I don't have a clue where to go next.
Thanks
Here is a new scan including IDE07771.
After standing over night it took 8 sec before fuel pressure building up, but it seems like throttle valve remains open and air mass pulsing between 2,5 to well above 4 g/s
If it matters, I have also replaced EGR valve and timing belt, but I'm not sure if this have any impact on the case. Timing belt double checked for correct installation, and the car started on first attempt and was running fine for 5-10 sec.
I'm also attaching full system scan and blockmap ignition on if it can be of any help. I have a DPF malfunction, (probably because of previous EGR malfunction?) strange thing is that date is saying 2106.01.01, not sure why, other error codes have had correct date and year.
Also in blockmap, IDE00385 have different value than the other injectors if that matters.
I hope you can lead me in the right direction here, because I don't have a clue where to go next.
Thanks
That's strange - have you verified that the fuel lift pump (in the tank) actually does provide fuel? Is the pressure build-up faster if you would run the lift pump by VCDS before starting attempt?
Yes, good thing is the throttle is open. So it's not stopping engine to start. Well, you could discount the air mass by the offset 1,03 g/s (when engine not running). Anyways, I think the air is not the issue.
To me it looks like the engine is almost starting as the RPM momentarily peaks above 500 RPM???
Shouldn't matter, and actually "IDE00182 Camshaft adaptation intake bank 1: phase position = -0.6 deg" indicates that timing is correct.
Obviously something had prevented DPF regeneration as the IDE00434 soot mass (calculated) is at 45 grams. Normally shouldn't go above 30 grams. Anyways, would expect to clear as soon as we get engine running and it can finish a DPF regeneration.
That's just a different date format in this ECU which VCDS doesn't interpret correctly. The time and the mileage are correct.
This ECU fires injectors three times during each power stroke - IDE00351(main), IDE00385, and IDE01380 - for normal engine running - thus normal. Another story when it's doing DPF regen...
The one below, or something else?
Finally at 6 years VW agreed to replace fuel filter. VW garage tool ODIS uses the procedures below to bleed the new filter.
That's all - start the engine - it starts up immediately - check for leaks
Fuel filter bleeding
(1) Run the pump for 60 seconds:
VCDS > Select > Engine > Basic Settings > IDE00459-Test of transfer fuel pump
(2) followed by 30 seconds of cyclic run of the pump
VCDS >Select > Engine > Output test > Fuel pump electronics
That's all - start the engine - it starts up immediately - check for leaks
Another proposal for the next start-up try. Just to exclude fully clogged DPF by monitoring pressure across it.
IDE00021 Engine speed
IDE00347 Air mass: actual value:
IDE00352 Main injection: duration of activation
IDE00407 Rail pressure regulation: status
IDE05632 Fuel pressure regulator valve actual value
IDE05633 Valve for fuel metering: feedback value measured
IDE07744 Particle filter: air pressure sensor 1 bank 1: raw value
IDE07771 Throttl.valve adapt. 1 bank 1: posit feedback - Actual value
IDE07818 Fuel high pressure sensor: actual value
IDE07819 Fuel high pressure sensor: unconditioned voltage
IDE07821 Fuel metering valve: activation
IDE07822 Fuel pressure regulator valve: activation
I can confirm the pump is providing fuel, I disconnected pipe after filter and ran the pump to check. Yesterday's log was after running lift pump, so I guess the answer is yes, I can verify later tonight.
Yes, it sort of "humping away" on one or two cylinder, but dies as soon as starter motor stops.
First I did the one in the old manual, but tried this one yesterday morning. Maybe a bit late, but didn't know about it before I started to read here on the forum.
Good to have all the other things I asked about explained, that's very valuable for me. I can go over and do the proper bleeding procedure to see if the pressure is building up faster doing a start attempt just after.
Thank you very much for helping me out on this, I really appreciate it.
If there is air in the fuel system the rail pressure will be slower to raise as the air is compressible and the fuel isn’t.
Cranking and bleeding at the injectors is by far the best means of bleeding but try the VW method and see if it works.
Did the correct bleeding procedure tonight, but it made no difference. Took 9 sec for pressure to build up, and no start.
Also tried to bleed at the injectors as suggested by DXX, after that, pressure came up pretty fast and i believe it was closer to a start than before. I will make a new log when starting tomorrow, and bleed at the injectors one more time. I was a bit in a hurry when doing it.
Also tried to bleed at the injectors as suggested by DXX, after that, pressure came up pretty fast and i believe it was closer to a start than before. I will make a new log when starting tomorrow, and bleed at the injectors one more time. I was a bit in a hurry when doing it.
