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!
  • Home
  • Questions
  • 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: Signal lights not turning off

Hi there. The stalk control (the steering column mounted turn signal lever) even though it has physically returned to the neutral or "off" position has switch contacts within which may be sticking closed. Either that or elsewhere the circuit has...

Q: Trying to alter the headlights off option to be longer than 20 seconds.

Unless you have the lighting control module accessed using the factory scan tester WDS or equal to set the exit light timer to your liking. Some modules did not give options and the 20 seconds is the only option. You...

Q: Speedometer jumps car moves slow

If your speedometer needle or gauge is jumping up and down while the vehicle is moving at a slower speed, two possible issues may have occurred. Either the whole instrument cluster has failed at some point preventing the speedometer from...

Related articles

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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...