The high-pressure fuel pump is tasked with the job of maintaining optimal pressure within the fuel rail of your Audi A4’s GDI system. However, a defective GDI won’t be able to do its job properly, as a result of which your car engine may run rough and seize up in the middle of nowhere. Therefore, if you’re experiencing signs of HPFP failure in your car, get it checked out by a reputed car mechanic.
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