Why does my spark plug wire keep jumping?
Attach the test light to a good engine ground. With the engine running, move the test light along the length of each spark plug wire. If a spark jumps from a plug wire to the test light at any point, this is an indication that the insulation has broken down, and the spark plug wire should be replaced.
How can you tell if a spark plug wire is bad?
In addition, the engine light coming on or visible damange to the cables can be signs of a failing wire. Be sure to first check spark plug wires for visual damage. Look for any signs of melting or cracking. The following situations call for immediate replacement of spark plug wires:
Can a bad spark plug cause a hard start?
Hard starts is one of the most common bad spark wire issues. Bad plugs can also drain the battery, stopping the engine from picking up. If you are certain it is not a battery issue, then you should replace the spark plug as soon as possible. Engine misfiring is one of the known symptoms of a bad spark plug wire in a car.
What causes arcing in electrical wire on motorcycle?
A breakdown in the insulation can cause arcing in the plug wire. You will be able to see the wire spark in low light conditions. Plug caps may be cracked, which can cause corrosion or an open circuit. To test the cap, you will need to remove it. Use your multimeter to check for resistance. It should read in the thousands for Ohms.
Attach the test light to a good engine ground. With the engine running, move the test light along the length of each spark plug wire. If a spark jumps from a plug wire to the test light at any point, this is an indication that the insulation has broken down, and the spark plug wire should be replaced.
Why does my pit bike keep sputtering?
Typically with most pit bikes, the problem is going to be with the spark plug or the carburetor; with the fuel system being the primary culprit. The first step we recommend is to check the efficiency of the spark plug.
Why does my Harley Davidson hard start when hot?
Hard starting when HOT, but the engine spins up fine, means either lack of fuel or weak, no spark. If your Dyna is EFI, your fuel pump is losing prime/pressure due to fuel line leak…look here: http://www.hdtimeline.com/diagnosti…lated/979-engine_dies_and_runs_in_spurts.html