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    marky58's Avatar
    marky58 Posts: 2, Reputation: 1
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    #1

    Jan 19, 2008, 01:38 PM
    2000 honda civic idle rpm
    Does anyone know how to adjust this and what is the normal idle rpm
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #2

    Jan 19, 2008, 02:18 PM
    Honda Civic Idle Speed Adjustment

    Idle speed adjustment is not straightforward. The idle adjusting screw is located on the end of the throttle body and is often “leaded in,” to prevent people from fiddling with it. Take a small screwdriver and dig it out. Also, locate the blue tachometer wire, which goes to the distributor. Actually, it is connected to the ignitor inside the distributor. The tachometer wire is buried, with a protective rubber cover over it, in a cluster of wires near the clutch master cylinder reservoir. Take a small screwdriver and carefully pry the connector from the rubber cover, using the small hole provided for this purpose.

    1. Start the engine and warm it up to normal operating temperature.
    2. Turn engine off and connect the tachometer to the blue tachometer wire.
    3. Disconnect the 2P connector from the Idle Air Control (IAC) valve.
    4. Start the engine with the accelerator pedal slightly depressed. Stabilize the rpm at 1000, then slowly release the pedal until the engine idles.
    5. Check idle in a no-load condition; i.e. headlights, blower fan, rear defogger, radiator fan, and air conditioning turned OFF. Adjust “Initial Idle Speed” to 450 rpm, by turning the idle adjusting screw.
    6. Turn the ignition switch OFF.
    7. Reconnect the 2P connector to the IAC valve, then remove BACK UP (7.5 A) fuse in the under-hood fuse/relay box for 10 seconds to reset the ECM. Make sure to record any radio codes first.
    8. Restart and idle the engine in a no-load condition for one minute. Verify that the “Final Idle Speed” is around 700 rpm.
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