EM-27
ENGINE MECHANICAL Engine Tune-Up
ADJUSTMENT OF IDLE SPEED AND
MAXIMUM SPEED
1. INITIAL CONDITIONS
(a) Engine at reach normal operating temperature
(b) Air cleaner installed
(c) All accessories switched OFF
(d) All vacuum lines properly connected
(e) Valve clearance set correctly
(f) Injection timing set correctly
(g) Transmission in N range
2. CONNECT TACHOMETER
3. ADJUST IDLE SPEED
(a) Check that the adjusting lever touches the idle speed
adjusting screw when the accelerator pedal is re-
leased.
If not, adjust the accelerator linkage.
(b) Start the engine.
(c) Check the idle speed.
Idle speed:
1PZ 600-700 rpm
1HZ M/T 600-700 rpm
1HZ A/T 660-760 rpm
1HD-T M/T 600-700 rpm
1HD-T A/T 750-850 rpm
(d) Adjust the idle speed.
• Disconnect the accelerator linkage.
• Loosen the lock nut of the idle speed adjusting
screw.
• Adjust the idle speed by turning the IDLE SPEED
ADJUSTING SCREW.
Idle speed:
1PZ 650 rpm
1HZ M/T 650 rpm
1HZ A/T 710 rpm
1HD-T M/T 650 rpm
1HD-T A/T 800 rpm
• Securely tighten the lock nut, and recheck the idle
speed.
• Reconnect the accelerator linkage.
• After adjustment, adjust the accelerator linkage.
4. ADJUST MAXIMUM SPEED
(a) Check that the adjusting lever touches the maximum
speed adjusting screw when the accelerator pedal is
depressed all the way.
If not, adjust the accelerator linkage.
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