Q: Smell gasoline and see black smoke from exhaust

asked by on

I smell gasoline and see black smoke coming out of the exhaust.

Hello. Black smoke from the exhaust is the first sign of a rich condition. This means too much fuel is entering the engine. This can be caused by a number of reasons from a leaking fuel injector to a failing sensor. In some drastic cases, it can even be an internal engine failure. A mechanic would typically install a computer scan tool that reads engine data to see what the sensors are seeing. This will let them know if a sensor is reading incorrectly. If not, then it may be a fuel injector that is stuck open. The best place to start is with a scan tool so that you do not replace any parts that are not needed. If you do not have a scan tool, then you should enlist the assistance of a certified mechanic to scan for fault codes and replace any failing parts.

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. Smell gasoline and see black smoke from exhaust

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: Too much oil in air tube

Hello. Some oil in the intake is normal. If there is a lot of oil then there may be something wrong. I usually clean the PCV system first to see if it is dirty and replace any worn parts. If...

Q: My truck is leaking oil and won't start. I tried jumping it before I found the oil leak under the truck.

Hello. It sounds like you have two different issues here. Most of the time the oil leak will not keep it from starting unless the oil is getting on a sensor such as the crankshaft sensor. I usually start with...

Q: Is a 2010 750i a reliable vehicle? There is so much stuff on the internet. I can't get a straight answer.

With any car, the life expectancy of it depends largely on the maintenance schedule the owner has maintained, the driving conditions it is subjected to, the driving habits of the owner and many other factors. There are inherent maintenance issues...

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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.