Pull the cold start handle all the way out and check the engine speed at fast idle, which should be between 1000-1100 rpm.
If the speed deviates from the norm, loosen the locknuts of the fast idle adjusting screw 3 (pic. 3-41). pull the cold engine start handle to failure and turn the screw to achieve the required crankshaft speed, then tighten the lock nut of the adjusting screw.
![](https://www.vwmanual.ru/img/passat/1568-podp_1.jpg)
Pic. 3-41. Diesel injection pump adjusting screws «AAZ»:
1 - idle adjustment screw;
2 - restrictive screw of the minimum idle speed;
3 — the adjusting screw of the accelerated idling;
4 - adjusting screw of the residual fuel supply;
5 - adjusting screw for maximum speed.
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