Skip the auto shop - Our mechanics make house calls

Q: Bad misfiring issue - 2004 Nissan 350Z

asked by on

My car burns oil out of both tailpipes is constantly low on oil and is misfiring. All of the spark plugs and coils are fine. Cylinder twos compression has only 60psi and cylinder five is always failing the spark plug with soaking it in oil. What could this be?

My car has 127000 miles.
My car has a manual transmission.

A: Engine misfires can be caused by a list of ...

Engine misfires can be caused by a list of problems, but there are a few suspects that occur more than others. Generally, misfires are caused by either a spark or fuel issue or in cases, a combination of both. Spark related problems generally will result from things like ignition coils, crankshaft position sensor, spark plugs, spark plug wires or ignition modules not working properly.

In your case, the low cylinder compression suggests that you may have excessively worn piston rings in cylinders #2 & 5, which can allow the oil to pass by the piston up into the combustion chamber causing the oil to be burnt along with the fuel. This will cause the motor to lose oil quickly and the spark plugs to foul out often. The result of a misfire or an explosion in that cylinder that is much less powerful than the other cylinders creates a loss of power that resonates throughout the motor additionally causing other problems with ignition and fuel timing.

If you'd like to get this fixed, I would recommend having an expert from YourMechanic come to your location to diagnose your misfiring problem and make the necessary repairs to your vehicle.

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: My ignition is jammed and my key won't turn

Hi there. What you're describing is commonly associated with a broken ignition lock cylinder. The ignition lock assembly is a tumbler and key mechanism that is used to trigger power supply to auxiliary components and engage the starter motor to...

Q: Brakes

Hello. If the issue only began after you changed the master cylinder, then it is likely that the issue is related to it. Certain brake master cylinders will require them to be pre-bled before installation and will not function properly...

Q: Replacemnet of crankshaft sensor

A rough idle often times is related to an engine misfire. Engine misfires can be caused by many different problems and are generally caused by either a spark or fuel issue or in some cases, a combination of both. Spark...

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...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...