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

asked by on August 22, 2016

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?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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

Transaxle light coming on

With the engine fully warmed up and running in PARK, open the hood and look for the transmission dipstick. Pull it out and give it a wipe. Dip it back into the tube and pull it out, this time noting...

White smoke from exhaust

Hello. White smoke out of the exhaust usually means that there is coolant getting into the cylinder head, or engine block. The most common cause of this is a blown head gasket. This means that the head gasket that sits...

Hi thanks for this chance. Based on auto indicator I took my car for service. I had to pay $586

In my opinion, I don't believe that you were cheated. These seem like fairly standard prices for those services. If you would like a point of comparison, you can enter your vehicle information and the same services into our estimator...

Related articles

How to Start a Car After Filling With the Wrong Fuel
Everybody Everybody makes mistakes, and putting the wrong type of gas in your car is one of those accidents that can cost a lot of money and become a huge inconvenience if not handled properly. If you put regular...
What Is the Difference Between a Diesel and a Gasoline Engine?
Gasoline and diesel engines use similar components but ignite fuel differently. Gasoline engines use spark plugs, while diesels rely on compression.
Symptoms of Bad or Failing Exhaust Supports
Common signs include the exhaust pipe seeming loose or swaying, the muffler hanging to the ground, and the exhaust sounding louder than usual.