Diesel Data: Automotive Repair
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H. Check Idle Speed and Basic Timing

H. Check Idle Speed and Basic Timing

1. Start the engine and warm it to normal operating temperature.

2. Run the engine for at least five seconds between 2000 and 3000 RPM.





3. Using a tachometer, check the idle speed. If it is not between 650 - 850 RPM, readjust it to 750 RPM using idle speed adjusting screw No. 1 (SAS-1), (Figure 19).

4. After the idle speed has been verified, verify that the basic ignition timing is 8 BTDC using the Service Manual Procedure. If it is not, readjust as necessary. Recheck the idle speed and adjust if necessary.
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