Q: Trouble Starting Audi A4

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Hi. I've been experiencing trouble starting my car just a week after doing a timing belt and sump service on my Audi A4 2.0 TFSI. This service has been done 2 years back and I've been experiencing this problem for 2 years now. The car's check engine light just suddenly stopped working at the same time when the car started having issues starting. I'm guessing there must be a relation between the CEL & starting issues. I'm not sure if there's any relation to this problem due to the timing service. I've done numerous diagnostics which shows "fuel open circuit" however nobody has been able to fix the problem for the past 2 years. When the key is left in the on position for a good few minutes after that I cycle the key and the in-tank fuel pump primes and the car starts immediately without hard starting. However the key has to be left on the "On" position for a considerable amount of time. Also when the car is started and hot it starts right back up again. CEL has never worked since.

My car has 169000 miles.
My car has a manual transmission.

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