Q: Spark plug not working

asked by on

One spark plug is not working, causing the engine to miss while driving. I don't know if all the spark plugs need to be changed or just the one (number six spark plug is not working). Also, the valve cover gaskets leak and the oil pan leaks.

A cylinder #6 misfire doesn’t necessarily mean the plug is bad. There are many other things that could cause a single cylinder misfire, from a faulty fuel injector to an engine mechanical problem. Anything that causes incomplete or abnormal combustion could be the cause. If your valve covers are leaking, there is a chance that the spark plug tube seals are allowing oil to get into the spark plug hole. This could cause a misfire and contaminate the plug. If the #6 spark plug is indeed causing the misfire, I suggest replacing all the plugs since the others are probably worn as well. I recommend having a professional, such as one from YourMechanic, inspect your vehicle firsthand. They will be able to determine the correct repairs and replace your spark plugs if needed.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Spark plug not working

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Valve gaskets need replacing.

Hi. Your cooling and oil systems would need to be checked for leaks. These are two separate issues. The cooling system should not be getting low, except for a very small amount over a six to twelve month period. The...

Q: SHould i change my ignition coil

You should change the ignition coil if it is not firing a spark for you causing a misfire.

Q: Fuel pump relay location on a 96 Ford Thunderbird.

Hi there. The fuel pump relay is located on the fuse box, the second relay on the bottom near the locking tab. The location port is C1051 for the fuel pump relay. If you need further assistance with the fuel...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...