Test 2: Fuel Injectors
- Check for fuel delivery at injectors. If one or more injectors are not operating correctly, start engine and check for movement of needles in injectors. Movement can be felt with finger.
- If no movement is detected, check power lines and coil of fuel injectors. If test is not okay, check wiring for shorts, breaks or poor connections and repair as needed. If wiring is okay, replace defective fuel injectors.
- If test value is correct, check power supply to injectors: Connect a volt/ohmmeter between wire No. 87 (Red/Blue) on relay No. 2 and ground (relay plugged in). Meter should read battery voltage. If not, go to TEST 3 for Motronic Control Unit.
- If voltage is correct, check activation of injectors. If test value is not okay, replace MCU.