Q: Black smoke coming out from exhaust and it wont accelerate, there is no power
my car is running for half an hour and suddenly black smoke coming out from exhaust and when I accelerate there is no more power it wont accelerate anymore.
My car has 155345 miles.
My car has an automatic transmission.
Recommended Services
| Mass Airflow Sensor Replacement | $188.36 - $786.53 | Get a Quote |
| Fuel Injector Replacement | $400.56 - $3968.30 | Get a Quote |
| Loss of power Inspection | $94.99 - $114.99 | Get a Quote |
The black smoke indicates you have a rich fuel condition happening in your fuel intake system. This means that the fuel being supplied to the motor is too much in relation to the air supplied creating an imbalanced air/fuel ratio being supplied to the motor. When this happens, you may notice a fuel smell and a lack of power as you describe. This can happen for a few different reasons such as a faulty mass air flow sensor, leaking or dirty fuel injectors and many others. I would recommend having an expert form YourMechanic come to your location to diagnose your vehicle’s running condition.
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
What others are asking
oil filters
You may only have one of the two options depending on the vehicle, engine, and year. If the bigger filter fits, then use it. Check the one that is being removed from the vehicle and compare their sizes. To be...
Stalls when shifting and oil leak issue. 2000 Mercedes Benz E55 AMG
First, check to see if the brake light is on when the vehicle is running in park. If the brake lights are on or the brake is pushed at the same time the gas pedal is pushed, you will get...
Fuel pump running with car off
Hello. A fuel pump that stays on when the ignition is turned off can be caused by a few things. If you do not believe that the behavior is normal, then it may be possible that the the ignition switch...
There is a blow off valve type sound coming from the engine and then steam coming out.
Let me address your mention of the A/C first because of the possibility of a refrigerant leak. Such leaks do create "steam clouds" like that you are describing but the leaks end VERY quickly because the refrigerant boils off violently...
Troubleshooting the fuel pump
Hello - qualified "yes" on this. The fuel pump should run for at least a second or two to pressurize the fuel system. I recommend double-checking fuses for the fuel pump and the engine management computer, the fuel pump relay...
Speedometer and odometer and trip mileage stopped working
The back of most dashboards is an electrical relay, which supplies power to individual components inside the dash. If all of these systems are not functioning, it's possible that this electrical relay is damaged; or perhaps an electrical wire /...
P0058 oxygen sensor heater circuit issue 2005 Dodge Dakota 4.7
Hi - for a P0058 (https://www.yourmechanic.com/article/p0058-obdii-trouble-code-ho2s-heater-control-circuit-high-bank-2-sensor-2-by-evan-clay), that is correct, passenger side, rear or "post/after catalytic converter" O2 sensor heater circuit failure. For assistance, I recommend an oxygen sensor replacement (https://www.yourmechanic.com/services/oxygen-sensor-replacement) performed by a mobile, professional mechanic, such as one from...
Car won,t start.
You mention the car being "parked". If, by chance, the car has sat unused for "months", the gasoline in the tank is usually bad and that alone will cause a no start condition. In a scenario such as that, the...
My 06 Chevy trailblazer gear shift fell off
The shift cable ends go bad and get worn and will come off of transmission or at shift lever connection. You will need to replace the cable end bushing if replaceable or replace entire cable to repair it.
Related articles
How to Buy a Good Quality Cylinder Head
The The cylinder head is one of the single most critical parts of your car’s mechanics, and one part that can trigger the most engine damage if it becomes compromised. The cylinder head, along with the head gasket, sits on...
How Long Does an Air Cleaner Temperature Sensor Last?
An An air cleaner temperature sensor is not overly common on newer vehicles. This is because in order to ensure that your car engine operates the way it should, several electronic sensors may actually be needed. However, if you drive...
How Long Does a Barometric Sensor Last?
The The barometric sensor (also called the barometric pressure sensor, or BAP) is one of a number of sensors on cars that have computer-controlled engines. All it does is measure atmospheric pressure, essentially the same way that a weather barometer...
Browse other content
Maintenance
Estimates