Hi All,
I need some help. I have a 2009 Audi S5 and the EPC and check engine light keeps coming on. I have taken the car to the deal and have had them scan the car for faults. I keep getting low fuel pressure. I have changed both high pressure fuel pump, both low & high pressure fuel sensors and still am having the dame issue.

I did change cylinder number 4 fuel injector due to it being stuck open and causing a miss fire. Any toughts or suggestions would be welcome. Audi's diagnosis was to change everything. They did not know what was causing the issue.

Thanks for your help!

 

check engine pump