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: I have a misfire from cylinder 1and 5. I replaced the coil pack and all 6 plugs and still have the misfire codes P0132 and P0135

Hello. Check the crankshaft position sensor and the distributor for slop in the distributor drive next, which can cause mistiming and misfire issues as well. A certified technician from YourMechanic can come to your car's location to diagnose the misfiring...

Q: Car going into limp mode

Hi Terrence. Thanks for contacting us tonight. Typically, the limp mode is activated when the ECU detects a fault with the transmission or driveline system. However, it can also activate when an overheating issue is detected. This might be the...

Q: Clunking noise at right passenger's side

Hello. The struts could definitely cause a clunking noise. However, there are other suspension parts that should be checked as well, such as the upper/lower control arms, and the upper/lower ball joints. These could also cause a clunking noise. The...

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...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.