Deceleration Fuel Shutoff
Deceleration fuel shut-off, checkingRequirements
- engine oil temperature 80°C (176°F) minimum
- idle switch OK
- disconnect main injector harness connector 1 from fuel rail wiring guide connector 2
- bridge connectors 1 and 2 using adaptor wires VW 1594/1, 2, 15 and 19
- connect US 1115 LED tester to adaptors as shown
- start engine and let idle
- LED tester must light up
- raise engine speed to approx. 3000 RPM and then release throttle abruptly
- LED must go out briefly (indicating deceleration fuel shut-off has been activated)