What can cause no spark on ATV?
The most common reason an ATV is getting no spark is a bad spark plug, either the wrong plug all together or just not gapped correctly. Or the spark plug just went bad, that happens quite often and it’s normal.
Can a CDI box cause no spark?
Sometimes, a bad CDI does not cause sparks at all. Again, when a CDI box is about to go bad, it can lead to misfires, issues with starting, rough running or even stall the motor. Therefore, the only way you can tell whether your CDI has a problem is by confirming that everything else is in the right condition.
What causes no spark?
Loss of spark is caused by anything that prevents coil voltage from jumping the electrode gap at the end of the spark plug. This includes worn, fouled or damaged spark plugs, bad plug wires or a cracked distributor cap.
Can a bad ground cause weak spark?
Actually, the operation of the points is what causes the coil to generate the spark, So if they are not right, or grounded improperly you will get a weak or no spark.
What are the symptoms of a bad ignition coil?
Ignition Coil Problems, Symptoms and Solutions
- Engine misfires.
- Rough idle.
- A decrease in car power, especially in acceleration.
- Poor fuel economy.
- Difficulty starting the engine.
- Check engine light is on.
- Exhaust backfiring.
- Increased hydrocarbon emissions.
What are the symptoms of a bad CDI box?
Symptoms could include misfiring, dead cylinders, backfiring, bizarre tach behavior, and countless other things related to how your engine’s running. The problem may get worse as the bike warms up. It might not even hold low revs at all.
How do you get a spark out of an ATV?
Remove the ignition coil lead boot from the spark plug. Pull straight outwards from the engine. Remove the spark plug from the engine. Use a spark plug socket wrench. Spark plugs sockets are either 5/8 inches (16mm) or 13/16 (21mm) inches. Connect the spark plug with the ignition coil lead.
How can I tell if my ATV engine is sparking?
To quickly tell if your ATV is getting spark, remove the spark plug from the engine. Reinsert the plug back into the coil wire. Hold the electrodes of the spark plug close to the engine to ground it, and try starting the engine. If you see spark coming from the end of the spark plug, your ATV engine is getting spark.
Where is the spark plug on an ATV?
To locate the ignition coil, simply follow the wire connecting to your spark plug. Once you have the ignition coil out, you can hook your multi-meter up to it to begin testing. Start by testing the primary side of the ignition coil, where the ignition coil was wired, not the side that goes to the spark plug.
What to do if your bike has no spark?
It’s a good idea to close the fuel tank petcock valve as a safety precaution if your bike has one or to remove the fuel pump fuse before checking the spark. Remove the ignition coil lead boot from the spark plug. Pull straight outwards from the engine. Remove the spark plug from the engine.