Hi again,
Wonder if anyone might be able to suggest any solutions to a starting problem I'm having with my S3 2.25 petrol, with a Weber 34 ICH carb'?
She died on me at at junction last weekend and I couldn't get her going and I wondered if the fuel had got too low in the tank, so I put 20litres of fresh petrol in and she started eventually. Got her home and when investigating what the issue might be I found when priming the fuel pump manually there was no resistance and only bubbles made their way to the (rather empty) inline fuel filter. Also found the pump had a slight movement where it's fixed to the side of the engine.
So I replaced the fuel pump, along with a new gasket and nuts where it fixes to the engine and replaced the inline fuel filter too (also checked the lines and fixings). When I manually primed the pump the inline fuel filter filled, which was an improvement and there was more resistance this time too. She fired up after a few key turns and the fuel bowl on the pump filled up. She ran perfectly for 15 minutes at both idle and high revs. I turned her off and then she wouldn't re-start.
What I've noticed is that when you hold the ignition key in the starting position 4 she fires & runs, but as soon as you release the key and it goes into the usual running position of 3, she dies.
Can anyone suggest why this might happen, and what the 'fix' might be?
Many thanks in advance,
Chris