2.2 JTS cold start issues
Had the same issue before - searched through the forum and turns out it was the exact same week last year!
My 2.2 Brera Prodrive (113k miles) has failed to start on first attempt a few times this week - first thing and after work when it's been sitting all day. It turns over and is very rough/shaky - prod of the accelerator isn't quite enough to save it and it dies but then second attempt it always starts no problem. For a second or two it idles all over the place and feels like it could cut out but a quick rev has it running fine again. After this there are no running issues during any journey and it'll start fine on subsequent attempts - the issue only arises again if it's sat all day or night.
The symptoms are the exact same as when it happend last year (at 100k miles). Both times it began when my petrol was below 1/4 of a tank so suspected vacuum issue or fuel pump. I added £30 of fuel mid-week so its sat around 2/5 but still happening.
Last year I put the car in for a service and got new spark plugs at the same time and the issue disappeared. Since then I've run it very low on fuel occasionally and there's we're never issues. Car has also had two other oil changes in the year. Timing chain was replaced around 96k miles (second change).
A couple of tank ago I ran a bottle of Wynns injector cleaner through and it felt great but now worried if it's caused an issue?
Has anyone experienced this issue or have some easy checks to rule anything out? Might need to buy a code reader to see what the car has logged on the failed starts. My exhausts are very very black so could it be that the spark plugs are already getting coked up again? Could it be the coil pack needing replaced?
Sorry for the long read!