Fuel System - High Idle After Warm Up At Low Temperature
83porsche02Subject:
Auxiliary Air Regulator
Part Identifier 2550
Applies To 911 SC
1980-83
Group
25
Key Points
Modification to prevent high idle after warm up in cold ambient temperatures C
Number
83-03
Sept. 16, 1983
To prevent high idle after the warm up cycle at low ambient temperatures, the heating element resistance of the auxiliary air regulator has been reduced from 33 Ohms to 26 Ohms as of May, 1982.
The new version regulator, which has a production date code number of 244 or higher (arrow 1), may be retrofit to earlier vehicles.
Should the engine idle remain abnormally high after the warm up period with the new version regulator, the following modification should be performed:
- remove auxiliary air regulator.
- carefully drive in end cap (arrow 2) exactly 0.5 mm. The distance of 0.5 mm must not be exceeded.
- reinstall auxiliary air regulator.