Volkswagen Golf/Jetta 2 manual

Increased idling speed valve (air conditioned models) - testing
Fuel and exhaust systems - K-Jetronic fuel injection - 8 valve engines / Increased idling speed valve (air conditioned models) - testing


1 Start and run the engine at its normal idle speed.

2 With the air conditioner switched off, pinch the hose at the increased idle speed valve (see illustration). The engine speed should not change.

5.2 Increased idling speed valve (air conditioned models)
5.2 Increased idling speed valve (air conditioned models)

3 Switch the air conditioning system on and then repeat the test. This time the engine speed should drop. If these tests prove the valve to be faulty then it must be renewed.

4 Disconnect the hose, unclip and detach the wiring connector then unbolt and remove the valve from its support bracket.

5 Refit in the reverse order of removal.


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