Originally Posted by nheav
Having the same problem myself recently with a 08' Golf 1.9 TDi.
Car cut out when driving down the road about a month ago. AA had a look at it in their garage after collecting it and gave me a price to replace the fuel filter, brought it to my own mechanic and he reckoned it was the fuel filter too.
He changed the filter and it was grand for 1 week until it happened again. Got it started back up by keeping the key turned for maybe 8-10 seconds and it eventually starts up. Brought it back to the mechanic who updated the new part on the cars computer, thought that might fix it, but then it happened again 2 days later. Then another 2 days later, then again 2 days later.
Everytime it starts back up (sometimes it needs to be left a few minutes) after keeping the key turned for a few seconds.
Brought it back to the mechanic again on Friday last, when I collected it from him on Saturday he told me that he turned the car upside down and only found 1 small issue which he wasn't confident would even fix the problem I was having (it was something to do with a dodgy relay near the fuse box somewhere)
Anyway, he was right not to be confident as it went again last night, so pretty much back to square 1.
I'm going to bring it to a VW main dealer today to try get them to diagnose the problem, but the fact that the car is currently running perfect (and probably will be until tomorrow or Wednesday some time, going by previous patterns) and that there are no warning lights etc. I'm not that confident that i'll get a solution here too easily.
I also have recently noticed what the OP said above about the car jumping a lot on the motorway, again no idea if it's related or not!
One thing that's probably important to state is that when I was getting the job done originally I was also due a service and timing belt change, so had both of them done along with the fuel filter!
Assuming the mechanic would have noticed the chafed wires (no guarantees I suppose) does anyone have any ideas of anything else that might cause this?
Just to give an update on this............
I brought my car into a main dealers who were unable to find an issue initially. I had the use of an alternative car for the week so they agreed to hold onto the car and keep driving it and hoped that the issue would reoccur.
It finally did which meant they were properly able to diagnose the issue.
And as I assumed it was something very small and silly............
Basically the original guy who put in the fuel filter put the pipe for the inlet and outlet on the wrong way around.
The VW main dealers said that it would still run in general as there was still fuel getting to it, just not correctly.
So all that hassle because someone wasn't paying attention when he was changing the filter day 1!
But i've had it back a good few weeks now and it's been perfect to that does seem to have fixed it!
So if anyone else has an issue like this check out the simple things!