Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Delivery Rate, Checking
Fuel supply line is under high pressure! Wear protective goggles and protective clothing to prevent injuries and contact with skin. Before removing from hose connection consult the Repair Information for proper procedure.
Test procedure
-- Observe safety precautions. Refer to SAFETY PRECAUTIONS
-- Observe Clean Working Conditions. Refer to CLEAN WORKING CONDITIONS
-- Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .
-- Remove high pressure in fuel system.
Test sequence
-- Read safety precautions before beginning work SAFETY PRECAUTIONS .
-- Observe Clean Working Conditions.CLEAN WORKING CONDITIONS
A second technician is needed for the following task.
-- Connect pressure gauge with adapter.
-- However, do not connect ends of Hose to fuel rail connector.
-- Hold the end of the hose in a measuring container.
-- Open shut off valve of pressure gauge. The lever points in direction of flow.
-- Switch ignition on.
-- Operate hand held remote (jumper). Slowly close shut off tap, until pressure gauge shows 4 bar fuel pressure. From this point on do not move position of shut off tap.
-- Release hand held remote (jumper) switch.
-- Empty measuring container.
-- Operate remote control for 15 seconds.
-- Compare quantity of fuel delivered with minimum delivery rate in diagram (cm3 /15s).
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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