04V10 #7 Injector & Misfire Codes - Club Touareg Forums
 
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post #1 of 6 Old 06-14-2018 Thread Starter
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04V10 #7 Injector & Misfire Codes

Hi Guys,

I have been absent from the forum for a few weeks,and there seems to be tons of threads about problems with V10's. Unfortunately for me, I need to add to the forum with a problem I'mhaving. Over the last year or so I've had a code that keeps popping uprandomly that looks like this:

Address 11: EngineII Labels: None
Part No SW: 070 997 016 R HW: 028 101 172 9
Component: V10 5,0L EDCG000AGSĒ2813
Revision: 5KO3 Serialnumber: VWZ3Z0D7258510
Coding: 0060575
Shop #: WSC 66565 257 00032
VCID: 2953E9F183F3020EFD-5000
1 Fault Found:
19563 - PD Unit Injector Cylinder 7 (N303)
P3107 - 000- Regulation Limit Exceeded
FreezeFrame:
RPM: 1449 /min
Torque: 300.2 Nm
Speed: 85.7 km/h
Load: 21.2 %
Voltage: 13.30 V
Temperature: 78.3°C
(no units): 127.0

I haven't been able to find out any information onthis code (that is helpful anyway) and it wasn't causing any driveabilityissues. So I would clear the code, and it would pop back up occasionally,however, it would sometimes be months apart that it wouldn't produce thecode. It didn't seem to be very consistent. Well today, fired thecar up and drove about a mile down the road and then the engine started to havea bad vibration to it that was noticeable at idle, and got worse the more myfoot pressed on the accelerator. I limpedit to work, and scanned it with the vag-com, and this is what I have now:

Address 11: Engine II Labels: None
Part NoSW: 070 997 016 R HW: 028 101 172 9
Component: V10 5,0L EDCG000AGSĒ2813
Revision:5KO3 Serial number: VWZ3Z0D7258510
Coding:0060575
Shop #:WSC 66565 257 00032
VCID:2953E9F183F3020C6F-4FE2

2 Faults Found:
19562 - PD Unit Injector Cylinder 7 (N303)
P3106 - 000 - Implausible Signal
Freeze Frame:
RPM: 1386 /min
Torque: 300.2 Nm
Speed: 82.1 km/h
Load: 0.0 %
Voltage: 13.38 V
Temperature: 50.4°C
(no units): 127.0

16691 - Cylinder 7
P0307 - 000 - Misfire Detected
Freeze Frame:
RPM: 567 /min
Torque: 158.0 Nm
Speed: 0.0 km/h
Load: 0.0 %
Voltage: 13.53 V
Temperature: 78.3°C
(no units): 127.0

Am I now looking at replacing an injector to fixthis problem? Or is this a wiringharness issue. A couple of years agowhen I did a semi-rebuild on it, I ended up installing a new wiring harness,but I did not replace the injector harness. Hind-sight is always 20/20, but I am dreading the thought of pullingthis engine back out for whatever repairs are necessary.

I would appreciate any advice on how to figure whatis needed to fix this!


Oh, she just turned over 205K miles today, FYI.

Garage:
2004 V10 TDI, Colt Stage 2 Cams, 211K Miles
2008 V10 TDI, 92K Miles
2015 Audi Q7 3.0 TDI, 52K Miles
2105 GMC Sierra Duramax, 48K Miles
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post #2 of 6 Old 06-14-2018
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Do you live near an injection repair service where you could take the no 7 injector for testing? It sounds like the issue is with that injector alone.

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post #3 of 6 Old 06-14-2018 Thread Starter
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No, I don't. The challenge with the injectors is that they are located underneath the camshafts. Engine out job to R&R, that's the dread that I have with it.

Garage:
2004 V10 TDI, Colt Stage 2 Cams, 211K Miles
2008 V10 TDI, 92K Miles
2015 Audi Q7 3.0 TDI, 52K Miles
2105 GMC Sierra Duramax, 48K Miles
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post #4 of 6 Old 06-15-2018
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The injectors are not located below the camshaft, they are adjacent to the camshaft, under the rocker assembly. All you have to do is remove the valve cover and rocker assembly. Engine stays in, camshaft is untouched.

With the engine running, try jiggle and rotating the injector harness round plug at the rear of the head. I had a similar issue on mine, and after some jiggling of that connector, the issue hasn't reappeared in 3 months.

You can see the round connector here:

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post #5 of 6 Old 06-15-2018
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Quote:
Originally Posted by chewblekka View Post
The injectors are not located below the camshaft, they are adjacent to the camshaft, under the rocker assembly. All you have to do is remove the valve cover and rocker assembly. Engine stays in, camshaft is untouched.

With the engine running, try jiggle and rotating the injector harness round plug at the rear of the head. I had a similar issue on mine, and after some jiggling of that connector, the issue hasn't reappeared in 3 months.

You can see the round connector here:





Yea what he said


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post #6 of 6 Old 06-15-2018 Thread Starter
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I stand corrected, the engine does not have to be removed to access the injectors or change them out. It's been a couple of years since I've had the engine apart, and I forgot. Thanks for telling me.

I pulled the rocker cover today and inspected the injector wiring harness. Found nothing wrong with it at all. I put an ohm meter on a few of the injectors; they all ranged between 1.5 and 2.5 ohms. I wanted to check for continuity between the injector harness and where it connects to the ECU, but for some reason I cannot access my Bentley online account. I need to rectify that next week. Anyway, if someone knows where I can find a wiring diagram so I can check for continuity, I would appreciate it.

I've never had an injector fail on any vehicle I've had, so I would love it if someone explain to me what fails on them, and if there is a way to diagnose, if possible, without taking the injector out and sending it to a repair shop. But if it's impossible, then that's what I'll do, if I first determine that the wiring is not the issue.

Garage:
2004 V10 TDI, Colt Stage 2 Cams, 211K Miles
2008 V10 TDI, 92K Miles
2015 Audi Q7 3.0 TDI, 52K Miles
2105 GMC Sierra Duramax, 48K Miles
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