Skip the auto shop - Our mechanics make house calls

Q: Car smoking and misfiring

asked by on

I have misfiring in one cylinder and white smoke from the exhaust. The engine also cuts off while I am driving.I know it needs a fuel filter, but it might also have a cracked head gasket.

The misfire alone is not enough to deem a blown head gasket. The fact that you have the white smoke present along with the misfire is sound evidence that this is the case. The white smoke means you are burning engine coolant inside the engine. The vehicle is likely cutting off due to high engine temperatures. You will need a qualified technician, like one from YourMechanic, to run a hydrocarbon test on the engine. This will detect whether or not you have a blown head gasket and help determine the cause of your engine’s smoking problem and misfiring issue.

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
  1. Home
  2. Questions
  3. Car smoking and misfiring

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 08 Chevrolet Impala and the service tire monitoring system came on. What should I do?

First, be sure that the alert you are seeing is not due to actual low tire pressure. Using a tire pressure gauge, if you do find low pressure in one or more tires, you should consider the possibility of a...

Q: Car stutters in gear and stopped, the check engine light is on

Hello. I would need to know what you replaced to try and diagnose this issue. If you replaced the spark plug and the ignition coil then you may have an internal engine problem. Most of the time this is caused...

Q: Cat ran out if oil, I replaced it . Got a jump to start it, cat started but would stop within 20 feet of driving what wrong?

From what you've described, it sounds like you may have spun a bearing on the crankshaft which is caused by running the car while low on oil. You should have the engine checked to see if this is the only...

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 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.
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.