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Home >> Mazda >> 1990 >> 626 Base >> Repair and Diagnosis >> Engine Performance >> Engine Controls - Adjustments >> Adjustments >> Idle Speed Adjustment
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Idle Speed Adjustment

Switch off all accessories. Set parking brake and block drive wheels. Connect tachometer to engine. Warm engine to normal operating temperature. Ensure ignition timing is correct.

Ground test connector and check idle speed. See Figure . See IDLE SPEED SPECIFICATIONS  table. If idle speed is not within specification, adjust air adjusting screw, located next to throttle lever.

IDLE SPEED SPECIFICATIONS

Application RPM
Test Connector Grounded
M/T 750
A/T (1) 750
(1) Automatic transmission in "P".
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