My Volvo 2004 V70 D5 diesel has developed a rough idle. It's got plenty of miles on it (227k) but otherwise is running fine. I suspect this has gradually got worse but I only noticed it yesterday for the first time, and the engine cut out once while sitting in traffic with a 'Urgent engine service required' (or similar) message on the dash. It restarted fine and hasn't cut out since.
I've not been able to read the fault codes yet, as I'm away from home, and the reader isn't with me. I notice that the engine shakes more than it should when idling with the bonnet open, and it sounds like the idle speed is wandering a little - but not enough to show on the rev counter.
I notice a small puddle of liquid around one of the injectors and it's more grubby than the rest (small leak?) but not enough to be worrying.
The car is serviced when it asks and generally is run on decent fuel, however the previous tank was supermarket stuff.
I suspect the electronic throttle body may need cleaning, or a vacuum leak. Apparently the vacuum engine mounts can leak on these.
I've cleaned up a throttle body on a petrol V70 recently which cured it's idle issues, so hopefully this is the same. I *do* have a tool kit with me so will get come carb cleaner later and see what I can do in the hotel car park tonight!
Any other suggestions or things I should look at?
Alan.