Skip the auto shop - Our mechanics make house calls

Q: Car shuts off, smoke and black water from muffler

asked by on

I am having trouble with my car shutting off. To explain, I will be driving and suddenly it will shut off, giving that sensation that it is out of gas. I replaced the gas filter with a new one. Also, while I’m driving and when I press on the gas pedal, smoke comes from the muffler, like it is burning too rich. The muffler is also discharging small amounts of black water. What is your advice on how to fix these problems?

The color of the smoke can point us in the right direction of the problem. Blue or purple smoke indicates oil burning in the combustion chamber and can be caused my weak piston rings, worn valve seals or a malfunctioning crankcase ventilation system. Thick white smoke is an indication of burning off coolant or water. The white smoke is steam coming from the tailpipe. In most cases, this is due to a blown head gasket. Black smoke is an indication of running too rich and the black smoke is unburned fuel. A boost leak on a turbocharged car or severely clogged engine air filter can cause black smoke. If you would like to have an expert go over these problems, a certified technician from YourMechanic can come to your car’s location to diagnose the smoke and stalling issues for you.

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!
  1. Home
  2. Questions
  3. Car shuts off, smoke and black water from muffler

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: What causes my truck to die when I take my foot off the gas pedal while in a turn?

Hi and thanks for contacting Your Mechanic. What seems to be happening is the idle air control valve (IAC) is not working. This valve controls the idle of the engine when the gas pedal and the throttle position sensor is...

Q: Car shutting off.

I would recommend that you ask for help from a mechanic to properly repair your wiring. Once the wiring is repaired he can check to make sure that there are no more problems with your vehicle and that the wiring...

Q: Weird noise in volvo 240

Without additional information it would be tough to say, however based on what you are describing, it sounds like potentially low differential oil causing the gears to whine a bit. There are also what is called trailing arm bushings which...

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 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...