Ignition System: Service Precautions

2003 Volkswagen Passat Sedan (3B3) V6-2.8L (ATQ)SECTION Service Precautions



Safety precautions

To reduce the risk of personal injury and/or damage to the fuel injection and ignition system, always observe the following:
- Do not touch or pull off ignition wires when engine is running or turning at starting RPM.
- Only disconnect and reconnect wires for injection and ignition system, including test leads, when ignition is turned off.







- If it is desired to turn engine at starting RPM without starting it, for example during the compression test, pull connector (1) off power output stage for ignition coil (2) and remove Fuel Pump (FP) fuse (28).

If special testing equipment is required during test drive, note the following:
- Test equipment must always be secured to the rear seat and operated from there by a second person.

If test and measuring equipment is operated from the passenger seat, the person seated there could be injured in the event of an accident involving deployment of the passenger-side airbag.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.