240 L4-2320cc 2.3L SOHC B23F FI (1983)
Check throttle valve switch adjustment:
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Slightly open throttle and listen to the throttle switch.
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A "click" (idle switch opens) should be heard immediately when throttle valve moves.
Adjustment of throttle valve switch (if required):
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Loosen switch screws (inhex 3 mm).
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Turn switch slightly clockwise.
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Then turn counter-clockwise to stop, but not so far that throttle valve begins to open.
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Tighten screws.
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Recheck function.
Connect test instruments:
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Connect tachometer.
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Connect CO-meter.
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Connect CO-meter to nipple in exhaust pipe ahead of catalytic converter