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HOMESERVICE MANUALSAUDI1996A4 BASE, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/O CODESSYMPTOMSDIFFICULT START (CRANKS OKAY)
1996 Audi A4 Base, Standard

Difficult Start (Cranks Okay)

1996 Audi A4 Base, StandardSECTION Difficult Start (Cranks Okay)
  • Ensure sufficient secondary spark is available.
  • Check air induction system for cracks and restriction.
  • Ensure vacuum hoses are not disconnected or damaged.
  • Ensure fuel system pressure and volume are correct.
  • Ensure fuel system residual pressure is correct.
  • Ensure fuel injector operation is correct.
  • Ensure EGR valve operation is correct.
  • Check for cracks and poor connections at throttle body.
  • Ensure ignition and valve timing are correct.
  • Check ignition coil primary connections and wiring harness.
  • Ensure ignition coil resistance is within specification.
  • Check Engine Coolant Temperature (ECT) sensor operation.
  • Ensure electrical harness and connectors are not broken or loose.
  • Ensure PCM has correct voltage supply and is properly grounded.
  • Ensure engine has sufficient compression.
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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.