Volkswagen Workshop Service and Repair Manuals

Special tools, testers and auxiliary items

• ◆ Ignition tester V.A.G 1767 or V.A.G 1367 with HT pick-up clamp V.A.G 1367/8
• ◆ CO tester V.A.G 1363 A or 4 gas tester V.A.G 1788
• ◆ Adapter V.A.G 1363/3
• ◆ Engine leak detector spray G 001 800 A1

Test sequence

Notes:

• ◆ The vacuum in the intake system will cause the leak detector spray to be drawn in with the outside air. The leak detector spray reduces the ignitability of the mixture. This leads to a drop in engine speed and to a significant increase of the CO content.
• ◆ The safety precautions listed on the container must be adhered to.

• ‒ → Connect ignition tester V.A.G 1767 or ignition tester V.A.G 1367 with HT pick-up clamp V.A.G 1367/8.

• ‒ → Connect CO tester V.A.G 1363A or 4 gas tester V.A.G 1788 with adapter V.A.G 1363/3 to CO sampling pipe.
• ‒ Start engine and run at idling speed.
• ‒ Systematically spray parts of the intake system with engine leak detector spray.

If the engine speed drops and the CO content changes:

• ‒ Check for leaks in the area of intake system sprayed and eliminate leak.