Just took the A4 out for a short run and there is now a popping sound coming from the cat area of the exhaust.
Drove it home and the popping has seemed to have quietened down a bit, but there is a major amount of hissing coming from the petrol cap, as if it is trying to suck in a lot of air. There is half a tank of fuel which was put in yesterday.
When idling it seems to occasionally miss a beat, and as it was hissing, I removed the petrol cap whilst the car was running and the engine cut out. Put it back on, the car started and so did the hissing from the cap.
Any ideas? Its quite worrying as it seems to be in the fuel department!!!
Any help seriously appreciated :crying: