If the engine does not start or starts poorly, the cause may be an incorrect installation of the retaining damper.
Free play is the gap between the control piston and the setting lever -right arrow-, measured from the side of the retaining valve closest to the fuel distributor.
Examination
Check CO content and idle speed, adjust if necessary. The required value corresponds to the basic setting of the adjusting lever.
Remove the air supply cover.
Turn on the starter for 10 seconds or press the fuel pump auxiliary control button.
Raise the retaining flap slightly until resistance is felt.
- 4-cylinder engine: free play must be min 0.5 - max 3.0 mm, which corresponds to the edge of the cone.
- 5-cylinder engine: the free play must be felt and must reach the maximum end of the diffuser cone, which corresponds to 2.1 mm.
Otherwise, remove the fuel dispenser and adjust the free play with the control piston stop screw using HAZET tool 2566.
Attention: The system is under pressure. Release pressure before removing fuel dispenser.
The distance between the stop screw and the shoulder of the hex nut must be a = 0.6 mm.
By screwing in the stop screw of the control piston, the free play of the damper increases, by turning it out, it decreases.
Turning the screw ¼ turn changes the damper free play by 0.3 mm.
Check idle adjustment.
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