Skip the auto shop - Our mechanics make house calls

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.

A: Hi, thanks for writing in. Was there oil do...

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?

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!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Misfire on fifth cylinder

There are a lot of possibilities for causes of a misfire. They have to be checked one at a time. It could be the spark plug, wire, or coil pack. Fuel injector or vacuum leak. It could be a mechanic...

Q: a volvo v70 AWD, rear differential does not work

I would need to know what symptoms you are experiencing and how you have determined that the rear differential is not working in order to give you a clearer answer. I cannot say how long you can drive it since...

Q: when shifting from gear to gear it barely catches so the rpms race high un til i let off gas and let car gradually go

Wow, manual transmission Volvo's are really hard to find. It sounds like you have a slipping clutch. This is pretty normal behavior for a worn out clutch, and with 170,000 miles, it's due for it. I would suggest having the...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...