Why are my spark plugs not firing when I start the engine?
A bad crankshaft position sensor that is not generating an ignition pulse signal can also prevent the spark plugs from firing. The fix for wet spark plugs (assuming there are no underlying ignition coil, plug wire or crank sensor problems) if often just to wait and try starting the engine again later.
Why do spark plugs need to be good?
Reduced Engine Power. Proper electrical conduction to a vehicle’s spark plugs is needed to ensure proper engine combustion and engine power. Any abnormalities in a vehicle’s electrical system, including in its spark plugs and spark plug wires, can negatively affect spark plug firing, which will influence engine combustion and engine power.
Can a spark plug be pregapped for an engine?
Most spark plugs are pregapped, but the gap may not be correct for your engine application. If you can’t avoid a lot of idling or short trip driving, refer to the spark plug supplier’s catalog for a spark plug that is one heat range HOTTER than the standard spark plugs specified for your engine.
What can I do to make my spark plugs run hotter?
Increasing the heat range slightly can improve fouling resistance by helping the plugs run hotter. If you have a modified performance engine, however, you might want to install spark plugs that are one heat range COLDER than the standard spark plugs that are specified for your engine.
How is the firing order of spark plugs determined?
The firing order of an engine is the sequence the spark plugs fire. On engines with a distributor, the firing order is determined by the routing of the spark plug wires from the distributor cap to the spark plugs in each cylinder. How do you calculate firing order?
Where does the spark wire go in a spark plug?
To maintain the proper firing order, each spark-plug wire must go from the spark source to the proper spark plug. Therefore, only remove the wire from one plug at a time, and don’t disconnect both ends of the wire!
What’s the best way to change a spark plug?
Depending on whether your car is equipped with spark plug wires or coil-on-plugs, the method will differ slightly. On engines using wires, simply remove the wire plug from the top of the spark plug by gripping it tightly at the bottom. Never pull the wire itself – it can be easily damaged.
What should I do if my spark plug is not connected?
If the engine of your vehicle backfires, turn it off immediately. After that, check if the spark plug wires are connected properly or not. You should always have your repair manual with you. That is one of the most important guides you can get to complete these procedures.