I have a 2000 model Oldsmobile Alero v6 and it sounds like it's knocking or something but when u pull a plug wire it stops. What could that be?

Answer: It is possible that there is a tear in the plug boot, so what you are hearing is the spark grounding itself to the side of the head and it goes away when you pull it out because it has no where else to ground to but itself. This will usually result in a tick, not really a knock. Also you would notice that the engine is running rough, hesitates on acceleration or even a check engine light with a misfire code stored.

Another possibility: If you mean that you were removing spark plug wires one at a time, and one of them caused the knock to stop, then that means that cylinder has a mechanical problem. Removing a plug wire from the cylinder that is knocking and the knock stops is a sign of worn rod bearing since the combustion and related pressures are eliminated when taking that plug wire off, thus no force on the piston to cause a worn rod bearing to knock.


Leave your comments

Post comment as a guest

0

    Comments
    Subscribe To These Comments-----   

    • No comments yet.

    Latest Articles

    Impala Flashing Engine Light

    I have a 2003/2004 impala i was driving it on the high way ...

    Hyundai Tucson 2016 A/C Blows ...

    2016 Hyundai Tucson. A/C worked great, parked the car for a ...

    Chevrolet Blazer Lost Power ...

    2000 blazer 4x4 lost power to drivetrain going down the ...

    Dodge Durango Timing Chain ...

    My 03 Dodge Durango 4.7L engine was blowing white smoke ...

    2002 Chevy Blazer Keeps ...

    My 2002 blazer keeps dying on me when I am driving, and ...

    How Things Work

    Charging System Components and Operation

    On today's newer cars and trucks, the generator (ALternator) provides DC voltage to operate the vehicle's electrical system and to charge the battery. A magnetic field is created when current flows through the rotor windings. The rotor is belt driven by the engine creating an AC voltage as this field rotates within the stator windings.

    Read more...

    Common Engine Codes

    Intake Air Temperature Sensor (IAT) Code P0112 Or P0113

    The intake air temperature (IAT) sensor is a thermistor which measures the temperature of the air entering the engine. The powertrain control module (PCM) applies 5 volts through a pull up resistor. When the intake air is cold, the sensor resistance is high and the PCM will monitor a high signal voltage on the IAT sensor signal circuit.

    Read more...