My car will start OK when cold, on the first or second attempt. It will start on the 1st attempt if the engine has been running, and the engine has only been shopped for a few minutes.
However if the engine has got hot, and then have been stopped for say 15 minutes, it can be very hard to start. Sometimes I even have to leave it for half an hour, and then it will start 1st time….
Why? What is going on?
With a bit of googling....
Some people say it may be due to the ECS wanting the engine to be turning over fast before turning the diesel ejector on when the engine is hot. But it mostly seems to be lots of parts being replaced until the right part is replaced to fix the problem, but it is a different part that solved it in each thread I found.
http://forums.tdiclub.com/showthread.php?t=116576 for example, but these seem to be a lot older then may, so the software may have been changed.
However these all see to be people having problems with hot restart, rather then when the engine has cooled a little.