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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    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,
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