Adjusting idling speed, idling speed boost and engine governed speed — VW
Adjusting idling speed, idling speed boost and engine governed speed on VW: factory workshop procedure for engines 1X, 1Y, AAZ, ABL.
Workshop procedure for VW — the factory write-up, straight from real workshop data.
📋 Procedure
Special tools, testers and auxiliary items
Ignition tester V.A.G 1367
T spanner 3231
Checking and adjustment conditions
Oil temperature at least 60 °C.
Cold start accelerator cable must not be pulled.
Electric consumers switched off.
Injection pumps with one-piece injection pump sprocket
Idling speed
The idling speed is adjusted by turning the screw on the idling speed adjusting lever -1-, on vehicles with air conditioner by turning stop screw -2-.
Specification: 900± 30 rpm
Note:
If by adjusting the screw on the adjustment lever -1- the idling speed cannot be set below 930 rpm because the adjustment lever -3- is against the stop screw -2- then continue as follows:
Release stop screw -2- for lower idling speed and screw back.
Set idling speed at adjusting lever -1- to 900 rpm.
Turn stop screw -2- until it contacts the adjusting lever -3- and then lock lock nut.
Checking and if necessary adjusting idling speed boost
When pulling the CSA cable out to the first stage the engine speed will increase by approx. 60 rpm.
With the cable fully pulled out the engine speed must increase to 1050 ± 50 rpm.
If idling speed is not to specification 1050± 50 with cable pulled fully out:
Release stop screw -arrow- and, with CSA cable fully pulled out, set the increased idling speed by turning the stop screw to 1050 rpm.
Lock stop screw.
Injection pumps with two-part injection pump sprocket
Idling speed
The engine speed can also be measured in measured value block of self-diagnosis with fault reader V.A.G 1551.
Adjustment is by turning the idling speed adjustment screw -1-, with the T spanner 3231.
Specification: 900± 30 rpm
Idling speed boost
When engine is cold or when switching on the air conditioner the idling speed will be increased by the idling speed boost actuator.
With the engine warm, press the stop lever manually to the end position of adjusting screw -2-; rpm must increase to 1050±50 rpm.
If idling speed is not to specification 1050± 50 rpm:
Release stop screw locking nut -2- and adjust increased idling speed to 1050 rpm by turning the stop screw.
Lock stop screw.
Engine governed speed (no load)
Open throttle fully and adjust rpm with adjustment screw -arrow-.
For one-piece injection pump sprocket
Specification: 5200±100 rpm
For two-part injection pump sprocket
Specification: 5050±100 rpm
Lock adjusting screw.
TorqFix answers live for your specific car — tell it the engine code and it serves the matching sequence, torque figures and wiring for that exact variant.
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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.