ignition AUDI A4 1996 B5 / 1.G AFC Engine Fuel Injector Leak Testing And Delivery Quantity Checking Workshop Manual

24-33


Fuel injector leak testing and
delivery quantity, checking

CAUTION!

Fire hazard! Do not smoke, work near heaters
or open flame, or have anything in the area
that could ignite fuel.

System pressure OK page 24
-20


- Remove intake air duct between Mass Air Flow
(MAF) sensor and sound dampener.

- Loosen ignition wires only as far as necessary to
remove fuel rail, and lay to one side.

- Disconnect fuel injector harness connectors.

- Disconnect fuel rail from intake manifold.
- Disconnect vacuum hose from fuel pressure regulator.
- Lift (and afterward support) fuel rail (complete with fuel injectors) from
intake manifold.
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24-34

Checking fuel injector leakage

CAUTION!

Fire hazard! Do not smoke, work near heaters
or open flame, or have anything in the area
that could ignite fuel.

- Use scan tool "Output Diagnostic Test Mode"
function 03 to trigger fuel pump relay -J17-
Repair Group 01.
- Visually inspect fuel injector for leaks (with fuel
pump running).

Maximum: Two drops per minute per fuel
injector
If fuel loss exceeds 2 drops per minute:

- Switch ignition OFF and replace leaking fuel
injector.

Note:
Always replace O-rings!
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