My 2008 diesel crv is struggling to start both in hot and cold weather. It's got a new battery. Left it for 15 minutes while at the shops today and it took 30 seconds to start. It didn't even try to run until it burst into life eventually. No faults indicated. First noticed it a month ago. It used to start as soon as I turned the key but started to struggle to start it in the cold and now when it's warm. No smoke out the back when it does start and it runs sweet when it starts.50,000 miles. Any advice much appreciated. ATB