Skip the auto shop - Our mechanics make house calls

Q: Muffler smoke after doing repairs on the car

asked by on

After I had some repairs done on the vehicle, I started it up and drove it around for a while. Then, there was a lot of smoke all of a sudden, coming from the muffler. I had the transmission oil replaced. Also, I changed the filter and oil, and had the spark plugs and air filter replaced. The problem happened after I did this. What did I do wrong and what could be the damage?

A: Most likely, the work you had done and the ...

Most likely, the work you had done and the smoke are unrelated. Black exhaust smoke indicates a rich air fuel mixture and can be caused by problems like a leaking fuel injector or faulty engine sensor. White exhaust smoke indicates coolant is leaking into the combustion chamber and can be caused by problems such as a leaking head gasket or cracked head. Finally, blue-gray smoke indicates that the engine is burning oil. This can be caused by issues such as worn valve guides or piston rings. I suggest you have a trained professional, such as one from YourMechanic, diagnose the smoke that’s coming from the car firsthand.

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

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: Car jerking when switching gears

The illumination of a dashboard warning light means that a vehicle system has detected a fault. In many cases, the vehicle can be scanned for fault codes and data concerning the system. Your symptoms lead me to believe that there...

Q: Opinion on using the Lucas transmission additive as a prevention

For modern cars, a lot of them are pretty particular on what fluid they use. If you just add the fluid in the mix, it may not be compatible with the fluid that's in your transmission. If your transmission...

Q: I have an automatic but also has the 6 speed manual. When I'm towing my 4000lb camper the truck RPMs at 2800 and only 100m/h

When a truck is towing a trailer or a fifth wheel, the engine will need to be producing maximum torque. The highest gear in most transmissions is the overdrive gear. The lowest gear typically produces the most torque from the...

Related articles

How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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...
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.