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?
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 adjustment on a 2010 Honda Odyssey

Yes it is bad if you don't do it. You'd want to have it checked at least. If they are not more than 4,000 of an inch off, you can leave them alone and drive it. But on Hondas, they...

Q: When I turn my car on it bogs down off and on but when I turn my ac on it will keep doing it worse and then the car starts shaking

There are a number of things that may cause the engine to bog down as you describe. The reason this appears to be worse when the AC is on is that the AC compressor requires a bit more power from...

Q: Q: Idle speed too high

The idle speed may be elevated due a a large vacuum leak. When unmetered air has entered the engine, the vehicle may try to compensate by adding fuel. The extra air and fuel translate to an increased idle speed. Have...

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...