Injector Diagnostics?

LangsamKafer

Active member
Joined
Dec 22, 2003
TDI
2014 Touareg TDI
Is it possible to diagnose issues with specific injectors in a CNRB? I was poking around in VCDS in advanced measurements looking for anything injector/injection related and found some values that look strange to me. I've pasted the values below without comment, as I haven't had a chance to research what I've pulled yet.

The values below were pulled from a well warmed up engine that was idling after driving 45 minutes at highway speeds.

Sunday,05,November,2023,22:48:13:27962
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 11 x64
VCDS Version: 23.3.1.0 (x64)
Data version: 20230421 DS346.2
www.Ross-Tech.com
Mileage: Repair Order:
Address 01: Engine (7P0 907 401 K)
22:47:55
IDE01387 Injector 1: rail pressure calibration point 1 18.40 µs
IDE01390 Injector 2: rail pressure calibration point 1 34.40 µs
IDE01393 Injector 3: rail pressure calibration point 1 35.20 µs
IDE01396 Injector 4: rail pressure calibration point 1 13.60 µs
IDE01399 Injector 5: rail pressure calibration point 1 18.80 µs
IDE01402 Injector 6: rail pressure calibration point 1 48.00 µs

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Address 01: Engine (7P0 907 401 K)
22:48:33
IDE01388 Injector 1: rail pressure calibration point 2 3.60 µs
IDE01391 Injector 2: rail pressure calibration point 2 4.00 µs
IDE01394 Injector 3: rail pressure calibration point 2 2.80 µs
IDE01397 Injector 4: rail pressure calibration point 2 8.40 µs
IDE01400 Injector 5: rail pressure calibration point 2 6.40 µs
IDE01403 Injector 6: rail pressure calibration point 2 7.20 µs

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Address 01: Engine (7P0 907 401 K)
22:48:50
IDE01389 Injector 1: rail pressure calibration point 3 6.40 µs
IDE01392 Injector 2: rail pressure calibration point 3 9.20 µs
IDE01395 Injector 3: rail pressure calibration point 3 8.00 µs
IDE01398 Injector 4: rail pressure calibration point 3 13.60 µs
IDE01401 Injector 5: rail pressure calibration point 3 14.80 µs
IDE01404 Injector 6: rail pressure calibration point 3 12.40 µs

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Address 01: Engine (7P0 907 401 K)
22:49:36
IDE00365 Injection quantity deviation cylinder 1 -1.67 mg/stroke
IDE00366 Injection quantity deviation cylinder 2 -0.81 mg/stroke
IDE00367 Injection quantity deviation cylinder 3 -2.27 mg/stroke
IDE00368 Injection quantity deviation cylinder 4 4.40 mg/stroke
IDE00369 Injection quantity deviation cylinder 5 2.93 mg/stroke
IDE00370 Injection quantity deviation cylinder 6 -2.53 mg/stroke


The background on my question is that the return fuel line has popped off twice while under heavy throttle, both times it has been the line from the left cylinder bank. With the exception of " Fuel Rail/System Pressure -Too Low" and " Contribution/Balance Fault " on all 6 cylinders immediately after the hose came off, the vehicle has been operating optimally in my opinion. No smoking on startup or normal driving, idles and runs smoothly, and is exhibiting excellent fuel economy.
 
Last edited:

Shoveltrev

Veteran Member
Joined
Feb 11, 2015
Location
Hutchinson ks
TDI
2002 new beetle deceased, 2003 jetta . 2002 jetta , 2012 sportwagon
i work in a bosch fuel shop and that #4 is suspect and any time we see a return line blow apart is when an injector or injectors on that bank are returning excessive fuel . that would contribut to your low rail pressure code too. any chance 4 is on the side blowing the return line
 

Shoveltrev

Veteran Member
Joined
Feb 11, 2015
Location
Hutchinson ks
TDI
2002 new beetle deceased, 2003 jetta . 2002 jetta , 2012 sportwagon
well if you wanna get creative you can pop the return line off the top of the injctors and fire it up and see what ones ones geyser on you. otjer wise id be at a minumum pulling those 3 and having them tested . anyone local to you have a Bosch eps 205 bench?
 

LangsamKafer

Active member
Joined
Dec 22, 2003
TDI
2014 Touareg TDI
I don't know anyone with a Bosch test bench locally.
On the IQ deviation values, is the acceptable range -3/+3?
Seems like all but #1 & #2 are pretty close to the limits.
Might be a good idea to swap them all out "while we're in there" (I'm going to have the valve covers replaced as well)
I mean, the car is just about at 300,000km. I have limited information on what services the car has seen in the past, but I will assume worst case.
 

TurboABA

Top Post Dawg
Joined
Jul 24, 2010
Location
Kitchener, ON
TDI
RIP-2010 Jetta 6spd 2014 Touareg Execline
Anything other than #2 would make be barf if it was my vehicle.
Here's what mine looked like a few months ago on what I consider to be a relatively healthy engine, fully stock (read AEM, no tunes, no mods)
Code:
               Address 01: Engine  (7P0 907 401 K)

19:48:14
  IDE00021   Engine RPM 682 /min
  IDE00025   Coolant temperature 92 °C
  IDE00365   Injection quantity deviation cylinder 1 0.05 mg/stroke
  IDE00366   Injection quantity deviation cylinder 2 -0.04 mg/stroke
  IDE00367   Injection quantity deviation cylinder 3 0.12 mg/stroke
  IDE00368   Injection quantity deviation cylinder 4 0.20 mg/stroke
  IDE00369   Injection quantity deviation cylinder 5 -0.13 mg/stroke
  IDE00370   Injection quantity deviation cylinder 6 -0.18 mg/stroke
  IDE01922   Vehicle distance driven 184396 km
  IDE04095   Engine running time Total:1601H2829s
 

LangsamKafer

Active member
Joined
Dec 22, 2003
TDI
2014 Touareg TDI
New values after injector replacement (all)

Code:
14:16:52
  IDE00365   Injection quantity deviation cylinder 1 0.08 mg/stroke
  IDE00366   Injection quantity deviation cylinder 2 0.20 mg/stroke
  IDE00367   Injection quantity deviation cylinder 3 -0.26 mg/stroke
  IDE00368   Injection quantity deviation cylinder 4 -0.02 mg/stroke
  IDE00369   Injection quantity deviation cylinder 5 -0.16 mg/stroke
  IDE00370   Injection quantity deviation cylinder 6 0.14 mg/stroke
 

TurboABA

Top Post Dawg
Joined
Jul 24, 2010
Location
Kitchener, ON
TDI
RIP-2010 Jetta 6spd 2014 Touareg Execline
New values after injector replacement (all)

Code:
14:16:52
  IDE00365   Injection quantity deviation cylinder 1 0.08 mg/stroke
  IDE00366   Injection quantity deviation cylinder 2 0.20 mg/stroke
  IDE00367   Injection quantity deviation cylinder 3 -0.26 mg/stroke
  IDE00368   Injection quantity deviation cylinder 4 -0.02 mg/stroke
  IDE00369   Injection quantity deviation cylinder 5 -0.16 mg/stroke
  IDE00370   Injection quantity deviation cylinder 6 0.14 mg/stroke
Looks great.
Have you noticed any improvements besides not throwing contribution or pressure faults any more?
Did you get new injectors or were you able to find remans?
And how much did they run you?
 

LangsamKafer

Active member
Joined
Dec 22, 2003
TDI
2014 Touareg TDI
Fuel economy increased a few mpg on average.
I took it to an independent mechanic and the itemized price for the new injectors was $378 each.
 

TurboABA

Top Post Dawg
Joined
Jul 24, 2010
Location
Kitchener, ON
TDI
RIP-2010 Jetta 6spd 2014 Touareg Execline
Ouch.... I hope you get to drive that thing forever man.... that sounds like a crazy "maintenance" bill.
 

LangsamKafer

Active member
Joined
Dec 22, 2003
TDI
2014 Touareg TDI
Yeah, it was definitely pricey. However, not being able to drive the car (ie:having fuel spew everywhere) was a show stopper, and I'm a believer of the "while we're in there" approach on it. I don't want to replace 1 injector only to have another one go shortly after.

Now I have to figure out how to get the diesel out of the padded belly pan, as it smells reeks of fuel when you walk around the car.
 
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