Checking vacuum advance: VW (PN)
Step-by-step checking vacuum advance for the VW (PN): 10 steps. What to remove, in what order, and what to check after.
Workshop procedure for VW — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: platform codes 1G1, 1G2
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- Slowly generate vacuum with hand-operated vacuum pump with accessoriesV.A.G 1390/. At 60…120 mbar, ignition timing must start to move towards advanced.
🔧 Engine codes this applies to
📋 Procedure
- Connect ignition testerV.A.G 1767 with pick-up clampV.A.G 1367/8 with ignition switched off.
- Connect vacuum testerV.A.G 1368 with hand-operated vacuum pump with accessoriesV.A.G 1390/ to vacuum unit.
- Switch vacuum testerV.A.G 1368 to continuity.
- Start engine and run at idling speed.
- Note displayed setting value as basic value.
- Slowly generate vacuum with hand-operated vacuum pump with accessoriesV.A.G 1390/. At 60…120 mbar, ignition timing must start to move towards advanced.
- Increase vacuum to 320 mbar.
- Calculate vacuum advance value as follows:
- Compare calculated vacuum advance value with specified value.
- Increase vacuum further.
Other VW procedures
- Checking breather and vent valve for function and leaks – VW
- Checking voltage supply – VW Jetta VI / Golf V / Jetta
- Checking transistorized ignition system with Hall sender switch unit N41
- Checking throttle valve positioner V60 fuel cut-off and starting function
- Checking cold start and warm-up enrichment – VW PN
- Removing engine · 41 torque figures
- Removing and installing camshaft – VW Golf Cabriolet · 47 torque figures
- Adjusting valve timing – VW Passat B5 · 83 torque figures
- Removing and installing camshafts – VW Passat B6 · 39 torque figures
- Removing and installing coolant pump · 53 torque figures
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
The story behind TorqFix →Workshop data on this page last updated 20 Sep 2026.