Q: Misfire in 2 cylinders

asked by on

The car has a misfire/knock not sure which. It has little power, the timing is fine, spark plugs are new, we have confirmed we have spark. There was oil underneath the spark plug cover. It also is getting fuel, and the fuel pump sounds fine. Confused on what it could be. Any help would be great.

My car has 200000 miles.
My car has an automatic transmission.

Hi, thanks for writing in. Was there oil down in the spark plug wells also? If so, the rubber plug boots may still have enough oil on them to short to the cylinder head. It is also possible, with your mileage, that you have a blown cylinder head gasket. Checking for low compression on 2 adjacent cylinders or checking for combustion gases in the engine coolant will be useful guidance. Some (but not all) ’95 Volvo 850s have OBD II diagnostics, many did not. Regardless, check for problem codes also (whether the Check Engine light is illuminated or not). Any codes that are set or pending will be a help in diagnosing this problem. If you would like help, consider having an expert automotive technician from YourMechanic come to your home or office to inspect and diagnose this issue for you, and make or suggest any repairs as 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. Misfire in 2 cylinders

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: Why does my car jerk & accelerate by its self?

From what you've described, the jerking is most likely due to a misfire or a vacuum leak on the engine. You should have all the spark plugs and wires checked for misfiring after your computer is scanned for a misfire...

Q: Older model drops to 5 mph for 60 seconds

Your description sounds like a fuel starvation problem. Checking fuel pressure will be a good place to start. A clogged fuel filter, failing fuel pump, failing or clogged fuel pressure regulator, or clogged fuel injectors could all cause this behavior....

Q: hi I got a voltmeter and I am trying to get help with trying to find out which vent solenoid terminal is neg and pos b4 backprobe

Hi there. Unfortunately, this isn't something we can really help with via computer and without being there to show you how the process is completed. You might want to consult with the testing equipment manufacturer to determine how to complete...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.