Tip & How-To about Audi A4

How to Test Spark Plugs in car?

The procedure is as follows:--
1)Test the spark plug ignition. For that disconnect the spark plug wire from the spark plug.
2)Then touch the spark plug wire close to a metal surface of the car. Then spin the key in ignition switch. If you will see a spark or hear a crackling noise. This means the wire to the spark plug has voltage in it.
3)If there is no spark when you crack the engine it means that a spark plug wire is dead.
4)Check out all the battery cable, ignition wires and coil wires are hooked up properly to their points.
5)If any of the battery cable, ignition wires and coil wires is loose then this can also relate to no spark.
6)But if all the battery cable, ignition wires and coil wires are properly connected then its time to replace the spark plugs.
7)Before replacing clean the old spark plugs connections and recheck.
8)Many a time’s cleaning or moving the spark plug connections makes it work.
9)If nothing is getting the spark plug to spark, then it needs replacement.
This will help. Thanks.

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change spark plugs


  1. Disconnect the spark plug wire at each spark plug.
    • Twist each spark plug 1/2 turn.
    • Pull only on the boot in order to remove the wire from each spark plug.
  1. Disconnect the spark plug wire from the ignition coil.
    • Twist each spark plug boot 1/2 turn.
    • Pull only on the boot in order to remove the wires from the ignition coil
  • Install the spark plug wires at the ignition coil.
  • Install the spark plug wire to each spark plug.
  • Inspect the wires for proper installation:
  • Repeat above procedure for all 8 cylinders.
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    engine stop


    If theres no spark from the spark plugs then you would have to replace them?

    Jul 12, 2008 | 1993 Toyota Corolla

    1 Answer

    How do you fix an Igniter Circuit Malfunction - No. 1. (P1300) on a 2001 Toyota echo?


    The problem 95% of the time is an ignition coil, if you do not have special equipment, your only tool is common sense, disconnect plugs from spark plugs, remove spark plugs,now insert the plugs in the wires and set them together touching metal ground them,
    Ask somebody to crank vehicle one of those wires or 2 of them if the coil is bad wont fire or the spark will be weak and orange, blue is ok. Follow the no spark or weak spark to the coil, now swap coils , repeat the same procedure if the problem follow the coil to the wires that were ok before the problem is the coil if the problem is still in the same position the problem is harness wires or computer.

    Jan 16, 2011 | 2002 Toyota ECHO

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