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Troubleshooting Engine Performance Problems Part 5



Find possible causes of engine problems by the symptoms your car is displaying.
More...
» Part 1: Hesitation...
» Part 2: Hissing...
» Part 3: Tapping...
» Part 4: Rattling...
» Part 5: Smoking...
» Part 6: Overheats...
» Part 7: Fuel Usage...
» Part 8: Smells...
» Part 9: Surges...
» Part 10: Stalls...
 

  • Gray smoke from the exhaust:
    You notice gray smoke coming from the exhaust when you start your car. The smoke may or may not disappear after the car is warmed. If it is, it is less noticeable. The smoke may have a bluish tint to it.

    Possible causes:
    1. The engine's piston rings may be worn: Replace piston rings. (Generally not a DIY job)

    2. The engine's valve seals may be worn: Replace valve seals. (Generally not a DIY job)

    3. Damaged or worn valve guides: Replace valve guides. (Not a DIY job)

    ~~~~~~~~~~

  • White smoke or water vapor from the exhaust:
    You notice white smoke coming from the exhaust when you start your car. If it is cold out, this may be normal. If the smoke does not disappear after the car is warmed, you have a problem.

    Possible causes:
    1. Transmission fluid may be entering the intake manifold through vacuum modulator: Replace vacuum modulator

    2. Cylinder head gasket(s) may be bad: Replace cylinder head gasket(s).

    3. Cylinder head(s) may be warped or cracked: Resurface or replace cylinder heads. (Resurfacing is not a DIY job)

    4. The engine block may be cracked: Replace engine block.

    ~~~~~~~~~~

  • Black smoke from the exhaust:
    You notice black smoke coming from the exhaust when you start your car. The smoke may or may not disappear after the car is warmed. If it is, it is less noticeable. Engine may or may not be running rough or misfiring.

    Possible causes:
    1. If you have a carburetor, the carburetor choke may be stuck closed: Repair or replace choke.

    2. Fuel injectors may be leaking: Replace fuel injectors.

    3. You may have a dirty air filter: Replace the air filter.

    4. There may be some other type of ignition problem: Check distributor cap and rotor. Ignition module may be bad

    ~~~~~~~~~~

  • Smoke is coming from under the hood:
    Mainly you will only see the smoke when you start your car or when you stop at a traffic light or stop sign. The smoke may or may not be accompanied by engine idling problems. This should not be ignored as it may lead to engine damage or fire. The cause of the problem is best identified by the color, smell, and amount of smoke.

    Possible causes:
    1. If the smoke has an oily smell, there is an oil leak: Repair oil leak.

    2. If the smoke is white, there is probably a coolant leak: Repair coolant leak

    3. If the smoke is blue or black and has a strong smell, there is wires burning: Repair wiring.

    More...
    »
    Part 1       » Part 2       » Part 3       » Part 4
    »
    Part 5       » Part 6       » Part 7       » Part 8
    »
    Part 9       » Part 10
    Additional Information provided courtesy of
    ALLDATAdiy.com and Warranty Direct
    © 2000-2007 Vincent T. Ciulla

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