Idle Speed/Throttle Actuator - Electronic: Adjustments

MAKING BASIC ADJUSTMENT OF VDO IDLE CONTROL SYSTEM

Requirements:
- Engine at operating temperature, i.e. oil temperature at least 60°C (140°F).
- Ignition timing and valve clearance correct.
- Air filter cartridge in perfect condition.
- All electric equipment switched off.
- Idle CO level correct.

Note: Basic adjustments are not made at certain intervals.





- Basic adjustments can only be made with application of this illustrated metal valve.
- This metal valve can be installed retroactively on a general basis.
- 1 = Basic adjustment screw





- Connect tester 13 4 030 on car battery (B+/B-) and idle control valve.
- Set switch (2) to 140 Hz.
- Run engine at idle speed.
- Adjust idle speed to 700 ± 50 rpm with basic adjustment screw (1).

- Remove tester 13 4 030.
- Connect plug from engine wire harness on idle control valve again.