Subject: CO Adjusting Procedure Models: 911, 924, 924 Turbo ALL
Bulletin Number: 80 – 03
To prevent “tampering” with CO adjustment, CO adjusting access hole is plugged. To adjust CO proceed as follows:
Porsche 911 SC
CO, adjusting
- Remove mixture control unit
- Remove fuel distributor from mixture control unit
- Center-punch plug in CO adjusting access hole
- Drill 2 mm (5/64 in.) hole in center of a plug to a depth of approx. 3.5 mm (9/64 in.)
- Remove plug using a suitable screw extractor
- Reinstall fuel distributor on mixture control unit
- Reinstall mixture control unit
- Adjust CO
- Install new break-away screw (Part No. 930.110.647.00) in CO adjusting access hole and tighten until screw breaks, leaving hole plugged
CO, adjusting
- Remove mixture control unit
- Using 2 mm (5/64 in.) drift from lower side of mixture control unit, drive out ball which is used to plug CO adjusting access hole
- Reinstall mixture control unit
- Check and adjust CO to specifications
- Drive “anti-tampering” ball (Part No. 900.108.041.00) to CO adjusting access hole using drift until it “bottoms” in hole.
Porsche 924 and 924 Turbo
CO, adjusting
- Remove mixture control unit
- Using 2 mm (5/64 in.) drift from lower side of mixture control unit, drive out ball which is used to plug CO adjusting access hole
- Reinstall mixture control unit
- Check and adjust CO to specifications
- Drive “anti-tampering” ball (Part No. 900.108.041.00) to CO adjusting access hole using drift until it “bottoms” in hole.
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