Skip the auto shop - Our mechanics make house calls

Q: My car started losing power, shut off, and will not restart. My number 7 spark plug also has oil in it.

asked by on

My corn started losing power going uphill I was about to make a turn with the brake the car shut down and will not restore my number 7 plug has oil in it

My car has 143267 miles.
My car has an automatic transmission.

Oil in a spark plug hole will generally cause a misfire to occur. This can happen when the spark plug tube seals get oil in them from not sealing correctly. This will often cause misfires resulting in the Check Engine Light also coming on. The misfire, when persistent enough, can cause a lack of power which may cause the car to stall as well. As you may know, however, a misfire can happen for many other reasons as well, such as poor fuel pressure, dirty or leaking injectors, a faulty O2 sensor, and many other things. The Check Engine Light should indicate one or more codes which will point to potential problems.

I would recommend having a professional mechanic, such as one from YourMechanic, come to your location to determine why your car is losing power and stalling and suggest any needed repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. My car started losing power, shut off, and will not restart. My number 7 spark plug also has oil in it.

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: Engine idles rough sometimes and looses power.

Hi there. Most of the time on diesel engines for Ford trucks, there could be an issue with the injection control pressure sensor (ICP). Check the ICP to see if it is functioning and has power to it. The ICP...

Q: Car overheats while not moving or moving very slow.

Hello. A temporary "hotter than normal" behavior like your are describing is likely to be a failed radiator fan switch. The switch (and fan) should power up when the engine temperature is hotter than normal - such as low air-flow...

Q: Water pump leaking

If you're positive the water pump is the source of the leak, then the replacement pump was not properly installed. Either the seal is skewed or the pump is not tightened down correctly. I recommend that you have a cooling...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...