I've noticed a light ticking noise coming from the engine of my Vauxhall Zafira that increases in noise and speed with the throttle. I've also noticed that there is gradual increase in speed from low gear instead of snappy acceleration I used to see.

The turbo hasn't worked in a while so I think this is something different. I also found that when I filled up the other day, it took a while for it to register on the fuel gauge where normally it would show immediately. I have recently checked and topped up the oil.