On a direct-injection GTI there are two fuel pumps: the camshaft-driven high-pressure pump (HPFP) and, in the tank, the low-pressure "lift" pump that feeds it. When the in-tank lift pump weakens, you get long cranking, stalling, hesitation and low-rail-pressure codes — and people wrongly blame the HPFP. Diagnose which pump before spending
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