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Audi S5: High Pressure Fuel Pump
Hello,
I have bought a Fuel Injector Cleaner but I am not sure how to use it on my car...
I have an Audi S5 V8 4.2l FSI from 2009, without a fuel filter (there is one in the tank only) and no fuel return to the tank. It is 100% stock.
As I can see, the fuel is supplied by a low pressure pump (tank) to the engine where there are two high pressure fuel pumps connected to the fuel rail.
I have doubts how to apply the cleaner...
If the mentioned two HPFP are able to pump/suck the cleaner from the can or the cleaner have to be applied under some pressure to the HPFP?
Thanks!
Chris
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