R reg audi a4 1.8 petrol manual. turn the igniton key, engine fires then dies. yellow light with car and key flashing. would fire up properly after a few goes. but 5 days down the line no joy at all

yes.the problem was the wiring loom from the ignition switch reader coil. when i towed it to the audi garage one of the mechanics loosen the steering column and yanked it in and out a few times and the car started. i left it with them it was £25 for parts and an hour and a half labour at £100 an hour. from what i gather changing the loom is easy. most annoyed because i am an hgv mechanic myself so i phoned the garage beforehand looking for some direction but they said it would need to go on the diagnostic machine. hope this helps yes.the problem was the wiring loom from the ignition switch reader coil. when i towed it to the audi garage one of the mechanics loosen the steering column and yanked it in and out a few times and the car started. i left it with them it was £25 for parts and an hour and a half labour at £100 an hour. from what i gather changing the loom is easy. most annoyed because i am an hgv mechanic myself so i phoned the garage beforehand looking for some direction but they said it would need to go on the diagnostic machine. hope this helps