3.6 CC. Cranking but not starting

[seanmau5]

Hey gents.. Back again.. This car is not doing any favours for VW with me..

Anyway, situation below.

Cold start - car cranks 2-3 times and starts just fine.

Warm(ish) start (within 30mins to 6-7 hours after running) - car cranks and cranks and cranks and eventually starts but runs very rough. Turn it off then start again - car cranks 2-3 times and starts just fine.

I’ve read crank sensor. I’ve also read temperature sensor. Will a VCDS scan show an error even though I’ve not had a CEL on the dash?


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[kamold]

Would be a good place to start.
Hopefully point more towards the cause

[SKiZO]

Just read something on this today. Could be unrelated but check the section on "carbon deposits" - AustralianCar.Reviews: #1 for Reviews and Used Car Valuations

[seanmau5]

Cheers for the link..

Bit of an update. VCDS scan shows no codes pertaining to issues with ignition. Mechanic measured fuel pressure and found there to be a possible issue there. Was able to replicate the problem by manipulating the high pressure fuel pump so the switch was replaced. No dice.

Just got the car back from timing chain replacement thinking that it could be a timing issue (I was well aware the car needed the work). No dice.

I am well and truly over this piece of . I will never buy another Volkswagen again - nothing but problems with it.

[Elmura]

Cheers for the link..

Bit of an update. VCDS scan shows no codes pertaining to issues with ignition. Mechanic measured fuel pressure and found there to be a possible issue there. Was able to replicate the problem by manipulating the high pressure fuel pump so the switch was replaced. No dice.

Just got the car back from timing chain replacement thinking that it could be a timing issue (I was well aware the car needed the work). No dice.

I am well and truly over this piece of . I will never buy another Volkswagen again - nothing but problems with it.

Must be poorly maintained, or high km. I've got a MY12 without any real dramas. I service it myself to be sure

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[seanmau5]

Must be poorly maintained, or high km. I've got a MY12 without any real dramas. I service it myself to be sure

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Bit of a **** comment to just assume that the car is poorly maintained.. I’ve got 135k on the clock. I’d list below everything that is wrong with it but I couldn’t be bothered wasting my time with it.


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[Elmura]

Bit of a **** comment to just assume that the car is poorly maintained.. I’ve got 135k on the clock. I’d list below everything that is wrong with it but I couldn’t be bothered wasting my time with it.


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Not really a **** comment. I had an R36 that had some issues which I inherited when I purchased it 80,000km old. The car had impeccable records by VW dealer servicing. That turned out to be useless though coz it depends on how well the servicing is done, and the condition between servicing (possibly ran low oil, didn't change filter, ran poor fuel.... who knows!)

[seanmau5]

So after a few scans that didn't seem to produce any problems, I finally got my hands on a cable to do my own scans.

Found a p0441 and p000a code. I can't find any information relating to p000a on the 3.6 bws engine. Does anyone have any advice? I have found information related to other engines - camshaft position sensor/camshaft positioner.

001089 - EVAP Emission Control Sys
P0441 - 002 - Incorrect Flow - Intermittent
Freeze Frame:
Fault Status: 00100010
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 136140 km
Time Indication: 0
Date: 2012.06.11
Time: 18:34:06


Freeze Frame:
RPM: 648 /min
Load: 28.2 %
Speed: 0.0 km/h
Temperature: 87.0°C
Temperature: 39.0°C
Absolute Pres.: 990.0 mbar
Voltage: 13.589 V


000010 - Camshaft Positioner (Bank 1 Intake)
P000A - 008 - Slow Response - Intermittent
Freeze Frame:
Fault Status: 00101000
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 136238 km
Time Indication: 0
Date: 2012.06.14
Time: 12:05:44


Freeze Frame:
RPM: 1187 /min
Load: 68.2 %
Speed: 0.0 km/h
Temperature: 27.0°C
Temperature: 32.0°C
Absolute Pres.: 1000.0 mbar
Voltage: 13.970 V

[seanmau5]

030907601E will be my first port of call.. Camshaft position sensor

[seanmau5]

Camshaft position sensor replaced and that didn’t work.

Can anyone confirm or deny whether a faulty N80 valve or blocked line on the evap system (p0441 code) could potentially choke the car of fuel? If so, I’ll purchase a 06D133517B

[00100100]

Might sound silly, but long time ago I had a similar issue with a different car/engine. When the engine is warm it did crank with no start. Until it cooled down a little. Turned out to be a loose wire or bad connection point to one of the sensors.

[seanmau5]

After weeks of mild temperatures and no real issues, Sydney was 36 degrees on Wednesday and my CC was in the sun all day and sure enough...

YouTube

Got it on video finally..


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[tinto]

My 08 R36 did this too. Fine if it was very cold, but it would craaaaaaaaaaaank for a long time if it was a warm day and I'd driven it earlier.
I never got to the bottom of it before I sold it, but had a coolant temp sensor on order after doing a bit of reading.

Mine had that rough running occasionally too - really disconcerting - made me think it was timing chains etc

I wish I could be more help - Good luck with it.

[neil]

Ive had similar issues for years , but I have the jetta TDI , can go months no issues , then usually after long drive
and you stop but then shortly after need to start it , it will crank not fire , I just pump the accelerator while cranking
and it always fires up this way although doesn't make any sense to me why, I've just learnt to live with it.

[00100100]

Looks like one of two cylinders have been shut off. When you did the error scan, did you do that while it is in that rough idling situation? It should report which cylinders are off. Could be the carbon build up issue, similar symptoms to others who had to clean their engine valve head. Even though the carbon problem is usually when the engine is cold. Have you been using foam cleaner regularly?