arosa 1.0 1997 difficult to start

[maxarosa]

Hi before I start I am a complete convert to the arosa I love it. Mine had developed a fault over a period of a few months where when you turn he key to start it if does not fire up with in the first few turns of the engine you have to keep it turning over for a long period of time and put you foot down approximately half way on the throttle to get it to start. When after many near starts it will start. When started it drives normally. In addition to this there is a strange noise some times when driving a woo hooing noise from under the bonnet I wondered if it was a vacuum leak or some thing this may be nothing to do with the starting problem but I thought I should mention it. The car was fitted with new air filter and sparkplugs a few days ago but it made no difference. I plugged in a fault code reader but it was not displaying any codes. Any suggestions would be much appreciated .

Best regards

Max