cs123. thanks for your response. The model is a 2004 6 cylinder. Some more symptoms, along with high idle, up to 1750 at start up fuel trip mileage drops by 10k for approx every 5k travelled, last night engine warning dash light came on and the engine was one spark short of stalling. Turn off then back on with no further indication of the problem. Despite running its own show I don't wish to be filling it up every 5 days.
Any more suggestions welcome.
Thanks