Idle Speed and Cold Start Valve - Adjustment

Product
CARS

Group:
23

No.:
2

Subject:
Idle Speed 024

Date:
August 1986

THIS BULLETIN APPLIES TO THE U.S. AND CANADA.

Service check of cold start device

As part of every 30,000 mile (48,000 km) maintenance service, the cold start device should be checked when checking/adjusting idle speed.

Check/adjust cold start device

Cold engine.




Measure distance between injection pump lever and idle stop screw.

Note:
The cold start device should be engaged.

Distance should be 3 mm.




Use gauge 5285.


To adjust

The distance between the cold start device lever and stop screw can be adjusted as follows:




Loosen ball stop screw. Place gauge 5285 or feeler gauge in position. Move ball stop to correct position. Retighten screw and remove gauge.

Check fast Idle

Connect Volvo Mono-Tester. Start engine and check that idle speed is 200 rpm higher than value obtained when engine was warm, i.e. approximately 950 rpm.

Warm-up engine

Warm-up engine and check that cold start device stop does not contact injection pump lever.