Skip the auto shop - Our mechanics make house calls

Q: it exhasts black smoke with particles and loses power after the drive of 30 minutes in a hilly or rough roads. what are the causes

asked by on

I have kia grand sportage 2005 . It exhasts black smoke with particles and loses power after the drive of 30 min in a hilly and rough area but it runs well on long and plain routes however, black smoke continues in all the drives.

My car has 65000 miles.
My car has a manual transmission.

A: The black smoke is caused by the engine run...

The black smoke is caused by the engine running excessively rich with fuel. This can be due to more than a couple reasons and a full diagnosis would need to be done to isolate the problem.

If you have an aftermarket device on your computer data link connector from your insurance company or from another source then try removing it and cycle your key several times. Afterwards, go on a road test to see if it runs better. These devices are know to cause various problems with vehicles. If you do not have a device like the one I’ve described then ignore this portion.

If the Check Engine Light is on then have the computer scanned and the codes will need to be diagnosed. Also, try cleaning your mass airflow sensor and replace the air filter with only a dry type filter. The oil type filters are known to foul the sensors and cause problems like these.

I’d suggest getting your car inspected by a certified technician, such as one from YourMechanic, to diagnose the smoke firsthand and make the necessary repairs to your vehicle.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: Oil is leaking in SUV, but source can't be found

Hello. You should start by checking the oil only when the vehicle has sat for about an hour to see if more shows up. If it does then you have a clog in the return holes in the engine. If...

Q: How do I view the average fuel consumption?

The average fuel consumption feature is displayed on the multi-information display, and shows you the fuel economy that your car has achieved since the last reset of the feature. To view the average fuel consumption, press the display button on...

Q: Car shaking in low rev, lack of power. Narrowed it down to faulty coil pack.

Hi there. It would be best to remove and replace all of the ignition coils that are not functioning correctly. Replacing all of the ignition coils will be good for the vehicle so you would be able to know what...

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 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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.