Skip the auto shop - Our mechanics make house calls

Q: Check engine light/emissions workshop! blowing black smoke while accelarating, among other acceleration issues.

asked by on

My car is blowing a lot of black smoke while accelerating and when going up hills or accelerating to get onto the freeway it stutters/has trouble getting up to speed. Last night it would not accerlate past 60mph, even though I had my pedal to the floor. Recently got the check engine light, with the Emissions workshop message. thank you

My car has 320000 miles.
My car has an automatic transmission.

A: Hello. Black smoke is usually the result of...

Hello. Black smoke is usually the result of an excessively rich condition. The black smoke is a result of excessive fuel from a rich condition that was not burned in the combustion chamber, burning up afterwards, in the exhaust pipe, and producing black smoke. This can be caused by many things. If the Check Engine Light is on, I would recommend you have the trouble codes retrieved to see if they may shed some light on what the issue may be. A few common causes of black smoke are a faulty fuel pressure regulator, faulty injectors, or a problem with the engine management system. If the fuel pressure regulator, or one or more of the injectors fails, then it may be possible that extra fuel is being fed into the engine, causing a rich condition. Have an expert mechanic, like one from YourMechanic, test the vehicle and diagnose the smoke and acceleration issues so that this can be properly addressed.

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!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: I installed a new crankshaft positioning sensor, now I'm getting misfires and code P0300. Is this supposed to happen?

Assuming you replaced your vehicle's crankshaft position sensor for a P0335 trouble code and that code has not returned, this leads me to believe that the new sensor is either faulty or misadjusted. The sensor replacement should not have caused...

Q: Valve cover gasket replacement.

The engine in this vehicle is a DOHC 4.6 liter engine. The replacement of the valve cover gaskets require the mechanic to be at a mid level of experience or lesser experienced mechanic using the proper manual for the repair....

Q: is it worth fixing the timing belt and timing pulleys?

If the belt is broken or the engine is noisy and having problem, then no, it probably wouldn't be worth purchasing. For whichever car that you are seriously considering moving forward with, I suggest having a certified mechanic conduct a...

Related articles

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 Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...