What causes the gap in a spark plug?
Normal rates of gap growth are as follows: Abnormal electrode erosion is caused by the effects of corrosion, oxidation and reaction with lead—all resulting in abnormal gap growth. Melting is caused by overheating. Mostly, the electrode surface is rather lustrous and uneven.
What should I do if my spark plug isn’t working?
It shouldn’t be a coincidental problem from another system like the fuel injection or air intake. Pull the #1 spark plug out and hold the threaded part to a grounded piece of the engine and have a friend try to start the engine, check to see if it has spark.
Why is there no spark in my ignition?
An ignition module requires some type of external input in order to activate. If your vehicle stalls unexpectedly during operation and will not start again, it is likely because of loose or corroded electrical connections in the ignition module. In this case, check the switch, clean oxidized terminals, and replace broken wires if necessary.
Why are my spark plugs dark in color?
Dark coloring, such as heavy black wet or dry deposits, can indicate an overly rich condition, too cold a heat range spark plug, a possible vacuum leak, low compression, overly retarded timing or too large a plug gap.
What causes a spark plug to turn yellow?
Caused by over advanced ignition timing; poor engine cooling system, lean air fuel mixture, or a leaking intake manifold. When these conditions prevail, even a plug of the correct heat range will overheat. Glazing appears as a yellowish, varnish like color.
When to change the spark plug in a car?
If the engine tries to turn over (even for a second) and dies, then you have spark. This would indicate the problem probably lies somewhere else (fuel, carburetor, valves, etc.). If the engine does not turn over at all, then there may be a problem with your ignition system. The first thing to do is change the spark plug.
When do you know you have a spark plug problem?
If the engine tries to turn over (even for a second) and dies, then you have spark. This would indicate the problem probably lies somewhere else (fuel, carburetor, valves, etc.). If the engine does not turn over at all, then there may be a problem with your ignition system.
What should the gap be between spark plugs?
Use a spark plug gauge to measure the gap between the two electrodes (one straight, one curved) at the tip of your spark plug Many small engines require a .030″ gap. Check for the specifications for your model. 2. If necessary, use a spark plug gauge to adjust the gap by gently bending the curved electrode.