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2001 Honda CR-V Question: idle problem

 

Question

mike q, Ossining, NY, August 10, 2009, 21:16
 Rookie

when i first start the car it runs good
after the car starts to warm up
when i stop the car stalls
and atarts back up with no problem
after the car warms up the idle goes up and down

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  • Answer #1

    backyard tech August 10, 2009, 21:42
     Master

    Vehicle Application: 1999 Honda CR-V EX 2.0L

    Customer Concern: Low idle and stalling when cold.
    Tests/Procedures: 1. This engine has had a lot of exhaust valve problems. The valves get tight and burn. To verify, perform a leak down test on the cylinder with the low compression.

    2. Remove the valve cover and check the valve clearance. If the exhaust valve is burnt, then the cylinder head will need to be replaced or rebuilt.
    Potential Causes: Exhaust Valves
    Burnt Exhaust Valves

    Tech Tips: Refer to Honda TSB #03-038.

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    backyard tech, August 10, 2009, 21:45
     Master

    How many miles do you have on the car? If I had more info, Manual trans or auto.

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    mike q, August 11, 2009, 05:27
     Rookie

    103450 miles just had valve job done last week
    (GOOD CALL)
    mec. worked on idle,changed idle, car stalls more then before change
    after it drops from high idle
    auto trans AWD
    no check eng. light

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    backyard tech, August 11, 2009, 06:22
     Master

    Vehicle Application: 2001 Honda CR-V EX 2.0L

    Customer Concern: The idle surges up and down when warm.
    Tests/Procedures: 1. Verify that the warm base idle is set correctly, the base idle speed should be 480-530 RPM with a warm engine and the Idle Air Control (IAC) valve unplugged. If the base idle cannot be set, check for a vacuum leak and verify that the IAC valve is not sticking open slightly. Also cover the throttle body.

    2. Check the fast idle valve on the bottom of the throttle body. When the coolant temperature is over 90 degrees, the fast idle valve should be closed and there should be no airflow on the 7 o'clock port in front of the throttle plates. Always verify that the coolant level and coolant flow to the fast idle valve.

    3. Verify that the Engine Coolant Temperature (ECT) sensor is not reading warmer than actual engine temperature. If the ECM thinks that the engine is warm, it would not expect a high idle and the idle will surge.
    Potential Causes: Incorrect Base Idle Speed
    Insufficient Coolant Level
    Engine Coolant Temperature (ECT) Sensor
    Leaking Engine Vacuum
    Fast Idle Valve
    Insufficient Fast Idle Valve Coolant Flow

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