760 L4-2320cc 2.3L SOHC Turbo B23FT (1984)
Idle Speed: Testing and Inspection
If the CIS air valve does not work properly, or the basic idle speed is not set to specification, the following symptoms may appear.
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Unstable idling
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Undesirable dip in engine rpm when going from higher engine speed to idle speed
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Too high idle speed
Air Valve, function test
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Check throttle switch setting and adjust if necessary.
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Warm up engine 10-15 min. Turn AC OFF. Ground test point red/white wire at right front wheel housing.
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Turn idle adjustment screw (arrow) to set low idle of 650-700 rpm.
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Disconnect grounded red/white wire. Engine speed should overshoot, but should return to normal idle speed of 750 +/- 20 rpm. If not, replace
air valve and recheck.
Idle speed, adjusting
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Ground test point red/white wire again.
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Set idle speed to 700-750 rpm.
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Disconnect ground from red/white wire. Idle speed should stabilize at 750 +/- 20 rpm.
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As an extra check, turn AC ON. Idle speed should increase to approx. 900 rpm.
If conditions are not met, consult procedures for troubleshooting LH fuel injection systems in the Fault Tracing, Repairs and Maintenance Service
Manuals referred to on the front page.
Failed Part No. 1317957-7
Defect Code
32
