William Ortel Porsche Repair

Basic Adjustment Of Mixture Control Screw After Replacement Of Operating Lever

• Solutions To Cutting Gas And Diesel Costs Within Minutes

Caution

Caution

This test requires that the sensor plate be positioned correctly (rest position).

Never apply downward pressure to adjusting wrench during adjustments, since this could change the injection timing.

1. Install mixture control unit.

6. Run engine to o]3eratin^ temperature (oil temperature 80 to 90 C) and adjust idle speed and CO level to their final specified values.

2. Bleed fuel lines. (Disconnect injectors and hold in a container. Move sensor plate by hand many times).

3. Use adjusting wrench P 377 to initially turn the mixture control screw counterclockwise about 1 - 2 turns.

4. Turn on ignition, pull plugs off safety switch on air flow sensor or fuel pump relay.

5. Turn mixture control screw clockwise until the injectors just barely eject. From this point turn the mixture control screw back, i.e counterclockwise, by one half turn.

Install injectors.