forum.audiv8.com Foren English Audi V8 Forum No Start, 5 Fault Codes

I recently changed the timing belt on my 91 Audi V8 with a 4.2 from a 93.
The first time, i got the timing one tooth off, and it ran very poorly, if at all.

Anyway, i purchased all the needed tools, the cam locks and everything, and set it correctly this time.
However, it wont start.

Last week i purchased a Ross Tech diagnostics unit to hook up to my laptop.
Here are the five fault codes it gave me for the engine.

Sunday,06,February,2011,21:16:47:38869
VCDS Version: Release 10.6.3
Data version: 20101206



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Address 01: Engine Labels: None
Control Module Part Number: 441 907 557 DA
Component and/or Version: MOTOR D01PMC 4
Software Coding: 0261203011
Work Shop Code: 1267357228
VCID: 5FC7A5A1F7BB
5 Faults Found:

00525 - Oxygen (Lambda) Sensor (G39)
03-10 - No Signal - Intermittent
00281 - Vehicle Speed Sensor (G68)
03-00 - No Signal
00515 - Camshaft Position (Hall) Sensor (G40)
30-10 - Open or Short to Plus - Intermittent
00513 - Engine Speed Sensor (G28)
03-00 - No Signal
00516 - Closed Throttle (Idle) Position Switch (F60)
30-00 - Open or Short to Plus

Readiness: N/A
Sunday,06,February,2011,21:21:01:38869
VCDS Version: Release 10.6.3
Data version: 20101206

I have ordered a camshaft positions sensor from my mechanic, and am waiting for it to come in.
I have also read that the Throttle position switch may need to be cleaned, i will post the link later.

Any ideas what to do?
It turns over and everything, and sometimes it almost starts, but doesn't. I can post a video tonight or tomorrow.

Hi Greesha,
perhabs a problem of engine grounding. Do you checked the grounding copper wire at the left side of engine?

Hi,

say hello to the people at www.audifans.com => audi V8 mailing list. There are some dozens of people from the US and most probably nearby you!

Regards

Bastian

Sorry, my english is not so good.

0015 - G40 Hallgeber

Evtl. stimmen die Steuerzeiten nicht.

Vielleicht kann das jemand translaten.

Carsten

0015 - G40 Hallsensor

Maybee the timing is not correct.

Mario, you are so beautilful.

I am pretty sure that the timing is correct this time.
When we first set it it was off, but I purchased the locking plates and we set it correctly.

Does anyone know where I can find a hall sensor?
This is the only one I can find, but i think that it is for the V8 engines in the A8.
http://www.ecstuning.com/Audi---V8/ES1876/ES1876/

Final note, would be help to clear the fault codes, and try running them again, because I did not clear them of read them after the first timing belt?

That hallsensor doesn´t fit.
The Bosch-No. of the sensor of the V8 is 1 237 031 339.

Greets

Your Hallsensor you find in the distributer on the Passengers side.
You can change the distributer with the sensor or
you change the Hallsensor it self.

Thanks!

I checked the engine ground, it is soaked in all sorts of crap, but is connected.
Small update:
I erased all the codes, and tried starting the engine again.
Only 2 codes now:
Sunday,20,February,2011,18:02:42:38869
VCDS Version: Release 10.6.3
Data version: 20101206



--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Address 01: Engine Labels: None
Control Module Part Number: 441 907 557 DA
Component and/or Version: MOTOR D01PMC 4
Software Coding: 0261203011
Work Shop Code: 1267357228
VCID: 5FC7A5A1F7BB
2 Faults Found:

00518 - Throttle Position Sensor (G69)
30-00 - Open or Short to Plus
00513 - Engine Speed Sensor (G28)
03-00 - No Signal

Readiness: N/A

So I am guessing I got the timing correct this time.
I have a new audi engine speed sensor.


Does the throttle position sensor also need to be changed?

Hi Greesha,
you can check the throttle position sensor. Disconnect it and check the resistance of it. Between pin 1 and 2 (of the potentiometer) 2 kiloohms, between pin 2 and 3 (or was it pin 1 and 3) there´s something between 1kohms up to 2.8 - 3kohms, depending on opening the throttle.
Check out the pins on corrosion and humidity.
Greets

I removed the engine position sensor, it was almost impossible.
I followed these instructions:
http://www.audiv8.com/german/faq/faq_show.php?id=201
translated via google translator, but it was much harder.
The engine speed sensor is the one on the left correct?
http://www.audiv8.com/german/faq/images/201-7.jpg
THe one responsible for telling engine where the crank is positioned correct?