I have a 2005 997.1 which I have had for 7 years. The fuel gauge used to be accurate and I could rely on it to put more fuel in if I got down to the reserve tank when the warning light came on. I did not do this as a matter of routine though, as I usually filled up before the light came on. I know the gauges are not that accurate due to the shape of the fuel tank. I use Shell super all the time.
Last year I had a holiday in Spain and used 98RON fuel most of the time except when not available, and on the way back the engine cut out with the gauge reading a quarter of a tank. AA called and no fault codes noted. I wondered about dodgy fuel and so we put in 5L of fuel. The engine burst into life and I filled up and no further problems.
This, however, has happened again twice. Fuel down to 1/4 of a tank and the engine cuts out, put in 5L of fuel and it starts again. I have measured how much fuel I have put in in these instances and I can only get 48L in the tank which is supposed to be a 64L tank, which suggests the tank is still 1/4 full. My local Indie has had a good look at the tank and the fuel take off and it looks fine. I do get a whoosh when I release the fuel cap. It has reduced the range of the tank significantly and leaves me needing to fill up sooner than I expect to. The remaining miles in the tank suggests about 90 miles on each occasion.
Does anyone have any ideas as to the cause, or suggest a solution? Thanks in advance....
Last year I had a holiday in Spain and used 98RON fuel most of the time except when not available, and on the way back the engine cut out with the gauge reading a quarter of a tank. AA called and no fault codes noted. I wondered about dodgy fuel and so we put in 5L of fuel. The engine burst into life and I filled up and no further problems.
This, however, has happened again twice. Fuel down to 1/4 of a tank and the engine cuts out, put in 5L of fuel and it starts again. I have measured how much fuel I have put in in these instances and I can only get 48L in the tank which is supposed to be a 64L tank, which suggests the tank is still 1/4 full. My local Indie has had a good look at the tank and the fuel take off and it looks fine. I do get a whoosh when I release the fuel cap. It has reduced the range of the tank significantly and leaves me needing to fill up sooner than I expect to. The remaining miles in the tank suggests about 90 miles on each occasion.
Does anyone have any ideas as to the cause, or suggest a solution? Thanks in advance....