A4 Cabriolet L4-1.8L Turbo (AMB) (2005)
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Check proper seal of fuel injectors visually. With Fuel Pump (FP) running, only 1 - 2 drops per minute may drip out per injector.
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If fuel loss is greater, stop Fuel Pump (FP) from running (switch off ignition) and replace faulty fuel injector.
Checking injection quantity
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Insert fuel injector to be tested in a measuring glass from VAG 1602 injection quantity test device.
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Connect one terminal of fuel injector to engine Ground (GND) using an adapter cable and an alligator clip from VAG 1594 A connector test kit.
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Connect second terminal of fuel injector to B+ using VAG 1348/3A remote control, VAG 1348/3-2 adapter cable and assisting cable.
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Jumper terminals 1 and 65 at test box with leads from adapter set VAG 1594 A.
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Switch ignition on.
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Fuel pump must run.
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Activate VAG 1348/3A remote control for 30 seconds.
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Perform measurements on all fuel injectors.
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After all four fuel injectors have been activated, place measuring glasses on an even surface.
Specification per injector: 135 ± 10 ml.
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If measured value of one or more fuel injectors is outside of specified range, switch Fuel Pump (FP) off (switch ignition off) and replace faulty
fuel injector.
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If measured values for all fuel injectors are outside specified range, check fuel pressure.
NOTE: Also check spray pattern when checking injection quantity. Spray pattern must be the same for all injectors.
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Reinstall fuel injectors together with fuel rail.