i have a golf 1.9 tdi (90) and a while back i blew the radio fuse, and since replacing it the car has trouble starting. I turn the key and the car will start normally but when i let go the engine instantly stops, so to the start the car i have to turn the key, and once the engine is started i have to keep the key in the starting position and rev the engine to about 2000rpm. Then when i let go of the key the car will stay started, does anyone have an idea what could be causing this? thanks hadley