I've got a 2002 tdi 130 (103000miles), normally it's a really good starter - as soon as the key is turned. However over the past month it's taking longer to start from warm, sometimes it's takes 3 or 4 seconds with it occasionally taking a few go's of turning the key. It's regularly serviced and had just had new filters , and the only fault code that is coming up is for an engine mount sensor. Other suggestions by friends are injectors and pump clearances. I'm going to fill up at a different forecourt and add injector cleaner to see if that makes any difference.
I have done a search but it hasn't brought up anything with the same symptoms. Any advice would be appreciated.
Thanks in advance