What causes a gap in the spark plug?
Excessive Spark Plug Gap. Excessive plug gap also results in cylinder misfiring, a possible no-start condition, wet, black or fouled plugs, engine hesitation and rough idle. Excessive spark plug gap also happens as result of normal electrode wear and age.
What are the symptoms of a narrow spark plug?
The symptoms of narrow gap include a noticeable (continuous) cylinder miss, hard starting if all the plugs have narrow gaps, rough idle and engine hesitation. A spark plug that does not fire, resulting from a narrow gap, will appear black or wet when inspected. The black or wet appearance indicates unburned fuel.
How often should you change the spark plug gap?
The spark plug gap adjustment should not be changed more than 3 times and should not exceed .008″ in either direction. Excessive changing of the spark plug gap setting will result in weakening of the spark plug ground electrode and can lead to breakage. Also, the spark plug gap should never exceed .055″ unless pre-set by the manufacturer.
How big is the spark plug gap on a Promod Turbo?
Some applications such as ProMod turbo cars using M1 fuel frequently run a spark plug gap as small as .012″, even though they are equipped with some of the highest output ignition systems providing in excess of 60,000 Volts high current and high mJ power output.
How do you check the gap between spark plugs?
Gap all plugs before installation using the manufacturer’s specs. Always check the spark plug gap before installing it. Slide the correct wire gauge (or gap gauge) between the electrodes. The wire should drag slightly between them. If the gap is too small, open it with the gap gauge by prying up.
Where does the spark plug wire end in a car?
If your car doesn’t have COP ignition, the spark plug wire will end in a boot that attaches to the spark plug. A spark plug wire puller makes it easy to pull the boot off. Blow away the dirt and grime that’s settled on and around the plug since it was installed.
What should I do if my spark plug is too big?
Slide the correct wire gauge (or gap gauge) between the electrodes. The wire should drag slightly between them. If the gap is too small, open it with the gap gauge by prying up. If the gap is too large, tap the side electrode lightly on a solid surface.
What kind of tools do you need to change spark plugs?
Tools Required 1 gap gauge 2 Needle-nose pliers 3 Rags 4 Socket/ratchet set 5 spark plug wire puller 6 swivel socket. 7 Torque wrench