Most likely nothing wrong with it if you've done all the checks, cars in general prefer to be driven. A good blast down the motorway could may well solve the issue.The car was previously used to go to work and back by the previous owner, and it’s been sat for around a year until I bought it more or less, I thought that it may need to be driven hard for a while to get it going again. It had the CCV valve stuff sorted in Feb 2016, so it can’t be that and I can’t spot any obvious air leaks.
Connor.