Vw Golf V6 4Motion starting issues
Discussion
Our V6 4Motion has been playing up for some while with the following symptoms:
The car will start and run after overnight...Just at lowish revs not at the typical 1200 rpm as normal at certain ambient temperatures 700 rpm when colder. However, if I turn the ignition off and then go back a few minutes later the car is a pig to start and will eventually start and run very rough indeed and smell of fuel.
If I leave it running this way for almost exactly 3 minutes, the car corrects itself and runs perfectly for the rest of the day with as many stops and starts as you want.
To date I have checked :
The fuel pump is priming...It is.
New Coolant Sensor
Cleaned throttle body
New engine vacuum pipes
New cam sensor as this was a code thrown up and my local garage said it was that, I said not as the rough running throws up all manner of codes some different each time!
New fuel filter
High quality fuel system cleaner.
The only thing that really made a difference for any appreciable time was the fuel cleaner, however, it is not long since the last cleaner and it is playing up again. I am at a loss and the only thing I can think is that the fuel pump is sticking when left overnight.
Any advice warmly welcome.
The car will start and run after overnight...Just at lowish revs not at the typical 1200 rpm as normal at certain ambient temperatures 700 rpm when colder. However, if I turn the ignition off and then go back a few minutes later the car is a pig to start and will eventually start and run very rough indeed and smell of fuel.
If I leave it running this way for almost exactly 3 minutes, the car corrects itself and runs perfectly for the rest of the day with as many stops and starts as you want.
To date I have checked :
The fuel pump is priming...It is.
New Coolant Sensor
Cleaned throttle body
New engine vacuum pipes
New cam sensor as this was a code thrown up and my local garage said it was that, I said not as the rough running throws up all manner of codes some different each time!
New fuel filter
High quality fuel system cleaner.
The only thing that really made a difference for any appreciable time was the fuel cleaner, however, it is not long since the last cleaner and it is playing up again. I am at a loss and the only thing I can think is that the fuel pump is sticking when left overnight.
Any advice warmly welcome.
TonyRPH said:
I have a V5 (similar engine) and in my case hard starting was cured by a new camshaft sensor.
I didn't have any of the other symptoms mentioned however.
My problem began by needing a bit of extra cranking to get it started but then gradually got worse until it wouldn't start at all...
Hi and thanks for the reply but I have no trouble starting it and it will run fine.I didn't have any of the other symptoms mentioned however.
My problem began by needing a bit of extra cranking to get it started but then gradually got worse until it wouldn't start at all...
The problem is when I start it from cold and then turn it off before it is fully warmed up, when I restart it, it will run really rough and misfire until warm.
It definitely seems like an over fueling issue but only when cold.
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