check engine AUDI A4 1995 B5 / 1.G AFC Engine Fuel Injector Leak Testing And Delivery Quantity Checking Workshop Manual

24-35

Checking fuel injector delivery quantity

CAUTION!

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

- Insert fuel injector to be tested into calibrated measuring container from
1602 fuel analyzer kit.

- Connect one terminal of each fuel injector being tested to engine
Ground (GND) using jumper wire from connector test kit VW 1594.
- Connect remaining fuel injector terminal to B+ using remote control
VAG 1348/3A, adapter wire VAG 1248/3-2 and jumper wire from
connector test kit VW 1594.
- Use scan tool "Output Diagnostic Test Mode" function 03 to trigger fuel
pump relay -J17- Repair Group 01. - Operate remote control VAG 1348/3A for 30 seconds.
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24-36

CAUTION!

Fire Hazard. Do NOT smoke or have anything
in area that can ignite fuel.

- After each 30 second fuel injector fill, place
measuring container on level surface (to
facilitate accurate reading) and record fuel
quantity delivered.

Specified value (each fuel injector): 85-110 ml
(2.9-3.7 oz.)
If the measured quantity for one or more fuel
injectors is under or over the specified value:

- Replace faulty fuel injector(s).
If the measured values for all of the fuel injectors
(as a set) are under or over the specified values:

- Check system pressure page 24
-20
.

- Re-install fuel injectors in reverse order of
removal.

- Replace O-rings on all fuel injectors and lightly
coat with engine oil.
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