Hi,
I have noticed that when the engine is running there is a loud hissing coming from the petrol cap on my 1997 A4 Avant 1.8T.
If I push the filler cap in the hissing stops, but then the idle on the car drops and it doesnt tick over smoothly.
I have tried swapping the petrol cap itself incase this was all that was worng, but that didnt solve it.
One last thing, the car seems to be very slightly hesitant - I had thought this might be the MAF, but am wondering if it linked to this problem somehow.
Any ideas guys? Cheers
I have noticed that when the engine is running there is a loud hissing coming from the petrol cap on my 1997 A4 Avant 1.8T.
If I push the filler cap in the hissing stops, but then the idle on the car drops and it doesnt tick over smoothly.
I have tried swapping the petrol cap itself incase this was all that was worng, but that didnt solve it.
One last thing, the car seems to be very slightly hesitant - I had thought this might be the MAF, but am wondering if it linked to this problem somehow.
Any ideas guys? Cheers