Question about 1991 Honda Accord

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Spark plugs i changed my spark plugs recently and when i check it today, it was coated with carbon deposits. i know it's not normal. could you help me with this? my car has a carburetor.

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  • Ed Woods
    Ed Woods May 11, 2010

    You are more than likely geting a little to much fuel. What kinda of car is it and if you know what is carb type?

  • Ed Woods
    Ed Woods May 11, 2010

    to much fuel

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  • 52 Answers

Try adjusting the carburetor.

Posted on Aug 19, 2008

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CHANGING SPARK PLUGS ON A 2002 LINCOLN LS


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PERORM A COMPRESSION CHECK TO ENSURE THE COMPRESSION IS GOOD .IF THE COMPRESSION IS IN ALL CYLINDERS PROCEED TO CHECK FUEL SYSTEM .REMOVE THE FUEL INJECTORS AND EXAMIN THE INJECTOR TIP FOR CARBON DEPSITS .CHECH FUEL SPRAY PATTERN ,ENSURE INJECTORS ARE ACTUALLY SPRAYING . THEN PROCEED TO EXAMIN THA SPARK PLUGS .LOOK FOR DISCOLOURATION OF SPARK PLUG ELECTRODES OR CARBON DEPOSITS. IN DIAGNOSING PROBLEMS ONE HAS TO SYSTEMATIC OR ELSE YOU WOULD BE WASTING MONEY AND TIME PURCHASING AND REPLACING COMPONENTS WHICH ARE NOT DEFECTIVE . GOOD LUCK .

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1. blown head gasket.
2. faulty piston ring.
3. cracks/leaks in the cylinder head. this is quite serious.

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Car doesnt idle normal after engine gets warm


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When do the spark plugs need changed


Spark plugs like any electrical device become worn over time. Spark plugs also work under extreme condition. The use of cheap fuels will leave deposits, poor maintenance, bad air filters, old plug wires, all these items can cause a spark plug to fail or not perform at its peak level. Also spark plugs use a gap or Electrical bridge that is used for high voltage to arc across. The larger the gap the hotter the spark until you reach a point that the coil can not bridge the gap and then you get a misfire. Also when a plug gets deposits from either oil, poor fuel, carbon this will shorten the gap and cause a weaker spark resulting in poor performance, wasted fuel and engine dieseling or Run on after the ignition is turned off.
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Hi, this is normally a fuel transfer issue. i recommend changing the fuel filter and fuel pump if not done already. I also would change the air filter as well.this will help with the air and fuel flow.

If possible, it would help even more if you would change the spark plugs and wires as well.

To top it off, Add a fuel system cleanser. Techtron makes some of the best fuel additives on the market. This type of fuel system cleaner will scrub the fule lines and intake as well, in return, cleaning out all carbon deposits that may be causing spuddering and obstructions.

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remove the spark plug lead from the plug, blow out any dirt etc from around the plug, undo the plug and remove from the vehicle, make sure the plug has the right gap setting before installing into the engine.
Check each plug that you remove for any sign of a wet or oily plug which are signs of more serious problems.
If all the plugs are dry with just a light brown carbon deposit on them they are firing ok.
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