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 1,000 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 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: Truck accelerated past 35 and started sputtering

Hello there, thank you for asking about your car. The first thing that comes to mind is a secondary ignition misfire (spark plugs, wires, etc.). An ignition misfire is most noticeable under load and can be felt as a shudder...

Q: Just put in a new fuel tank and my engine won't draw diesel from it to start.

Hi there. Check the fuel transfer pump and see if its drawing fuel into the fuel filter. If there is no pressure after the fuel transfer pump, then the small transfer pump needs replaced. If there is pressure after the...

Q: When car starts, it shudders before shutting off

A clogged fuel filter can cause stalling issues on a vehicle. The clogged fuel filter makes the fuel pump work harder to deliver fuel to the engine and can overheat the fuel pump. The fuel level sending unit is in...

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...
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...