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05-06-2011, 18:06   #1
dave2006vw
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VW 1.9 TDI Golf Looses power and cuts out at junctions

Hi everyone, first time poster I hope someone can help. I have a 2006 MKV 1.9 TDi VW golf. The car has developed an intermittent problem which I am having great difficulty diagnosing. When the car has been running for a while and is at normal temperature it intermittently cuts out when I stop at a junction or traffic lights. There is no noise and no lights come on it just cuts out and then when I try to restart it I might have to turn it over for a couple of minutes pumping the accelerator to get it to start. It will then run very roughly when it is idling and will generally cut out again the next time I stop. When this problem isn’t happening it starts perfectly every time and runs perfectly. As I said no warning lights come on, I have had a diagnostic run on it and there are no errors showing. The fuel system has been cleaned out and the pumps are fine. I am not sure if it is related but when I get onto the motorway in 5/6 gear and I accelerate hard the car jumps a lot, if I easy off the accelerator it runs fine again. I have done some research and I am aware it could be an electrical fault like a ground but I wondered if anyone had any experience of this.
Hope someone can help.
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05-06-2011, 19:02   #2
dr.fuzzenstein
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I know you say you had the fuel system looked at, so this may be done already, but what about the fuel filter and air filter?
If either, or both, are filthy that could cause problems.
Other than that it could be hoses connection air intake, filter, turbo, injector, etc...
I'd start there.
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05-06-2011, 19:35   #3
MarkR
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I'm going through a very similar problem with my 04 diesel avensis. Start with the fuel and work up really. Fuel, fuel filter, fuel pump, fuel line, injectors. I've changed my fuel filter, had the injectors tested. There was a load of crap in the fuel pump seemingly, which was cleaned out. Still not quite right, may need to bring it to the main dealer for a 200k mile service and a bit of fault finding.

Hope to god it's not the fuel pump. They call it the injector pump, and it's 1200!

Oh, Solenoid Control Valve and EGR are other things to check according to nerds on the net.

Tried using some dipetane?
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05-06-2011, 21:48   #4
shawnee
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Be careful where you are getting your diesel, a lot of dodgy diesel around these days !
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06-06-2011, 11:16   #5
Row
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If you have the same engine which i guess you have i had a similiar problem on a 05 skoda octavia 1.9 Tdi where it was driving normally and then for no reason would loose total power.
Very Dangerous..

There were no fault codes logged......so with time and patients i found a chafed wire supplying the camshaft sensor.

Behind the oil filter housing there is a wiring loom supplying the camshaft sensor and another loom teeing off that to the map sensor (turbo pressure sensor) pull back unsulation and check all wires.....see photo.
If the problem is'nt there i still think the problem is camshaft/crankshaft sensor related.....
Best of luck with it..

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06-06-2011, 13:37   #6
ION08
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If it's running rough I'd say take a look at the throttle body. Take it off and give it a good scrub using carb-cleaner.

Easy job and carb cleaner costs a fiver.
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06-06-2011, 13:52   #7
dave2006vw
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Guys thanks for all the help. The reason I don't think it is fuel is I have had the fuel system, filters and tank cleaned out thinking that was the reason. Like you Row there are no warning lights which in modern cars makes the problem harder to find and I dont want to spend a fortune changing parts trying to track it down. I have read on other forms that it can be an electrical problem like a bad earth and on older MKIII & IV models a particular fuse, but on more modern Golfs that was sorted.
Row I will take a look and see if your suggestion helps.
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06-06-2011, 14:24   #8
Row
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Quote:
Originally Posted by dave2006vw View Post
Row I will take a look and see if your suggestion helps.
It may not be your problem but here is a closer look at the chafed wire i found...After i soldered & fitted heatshrink it has been fine since

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