Repair Safety Notice:
This information is for general instructional purposes only. Vehicle repair can be dangerous.
Verify all information, follow manufacturer service procedures, use proper tools and safety equipment,
and consult a qualified repair shop when needed.
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WRENCHTECH
CAR REPAIR CONTRIBUTOR
20,761 POSTS
Because it's leaking down somewhere. It's your job to determine where by systematically closing off escape routes until it stops. It could be the pump, the regulator or a leaking injector.