TorqFix

Checking injection rate and injectors for leaks: VW Golf IV / Bora 2.0 (AZJ)

Step-by-step checking injection rate and injectors for leaks for the VW Golf IV / Bora 2.0 (AZJ): 12 steps.

Workshop procedure for VW — the exact step sequence and torque figures, straight from real workshop data.

12 steps 1 engine code

🧭 Before you start

Fits: VW Golf IV / Bora (1J)

  • Renewed: leaking injector, seals

Don't miss

  • This work step is only to allow fuel pump to run while engine is running.
  • Always renew seals.

🔧 Engine codes this applies to

AZJ

📐 10 workshop diagrams for AZJ

Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.

Checking injection rate and injectors for leaks — AZJ · diagram 1
Checking injection rate and injectors for leaks — AZJ · diagram 2
Checking injection rate and injectors for leaks — AZJ · diagram 3
Checking injection rate and injectors for leaks — AZJ · diagram 4
Checking injection rate and injectors for leaks — AZJ · diagram 5
Checking injection rate and injectors for leaks — AZJ · diagram 6
Checking injection rate and injectors for leaks — AZJ · diagram 7
Checking injection rate and injectors for leaks — AZJ · diagram 8
+ 2 more diagrams
🔒 10 workshop diagrams for this job Ask about your VW AZJ — free or sign up free to see the drawings

📋 Procedure

  1. ⚠ Fuel system is under pressure! Before opening system, remove fuse No. 28 and wrap a cloth around the connection. Then release pressure by carefully loosening the connection. — Connect adapter cable, 121-pinV.A.G 1598/31 to control unit wiring harness. Do not connect engine control unit.
  2. Remove top part of intake manifold.
  3. Pull connectors off injectors.
  4. Loosen securing bolts on fuel rail.
  5. Remove vacuum hose from fuel pressure regulator.
AZJ? Steps differ between engine variants — check this job against your exact car before you commit to it. Check my car — free →
  1. Remove hose for air-embedded injectors from air tube .
  2. Raise fuel rail and injectors from intake manifold and support .
  3. Bridge test box sockets 1 and 65 using auxiliary leads from auxiliary measuring setV.A.G 1594C. [Note: This work step is only to allow fuel pump to run while engine is running.]
  4. Switch on ignition.
  5. Check injectors for leaks (visual inspection). When fuel pump is running, only 1 to 2 drops per valve per minute may escape.
  6. Switch off ignition and renew leaking injector.
  7. Erase fault memory to set teach-in values to neutral . [Note: Always renew seals.]
Workshop diagrams

Ask TorqFix about your VW AZJ — it answers with the exact sequence for that engine and the workshop drawing for each step. First question is free after a 20-second sign-up, no card.

Ask about your VW AZJ — free → or sign up free to see the drawings

Other VW procedures

Who makes these pages, and how

TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.

The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.

Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.

Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com

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Workshop data on this page last updated 20 Sep 2026.