Q: Muffler smoke after doing repairs on the car

asked by on August 18, 2016

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?

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.

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

Does a stuck thermostat set off a Check Engine Light?

Hey there. A stuck open thermostat can cause the engine to take too long to warm up, not reach proper operating temperature at all, possibly run rich, and MAYBE set that fault code. The engine electronics are programmed to...

Oil leaking and engine went out after sitting for 5 months.

If oil dumped out of the vehicle and then it stopped running, there was likely a catastrophic failure and subsequent lack of oil pressure. From your description, it sounds like there is a good chance the engine is ruined. A...

push button starter switch inoperative

Hello there, many common faults will cause your 2010 Volvo XC70 to have issues starting. You have done great in replacing the battery already as this is the cause in many cases. Other potential causes are the starter, fuel pump,...

Car not moving

Hi there. Im unsure of the issue you are reporting. There are countless amounts of issues your vehicle may be experiencing. If your vehicle is stuck in park there is a brake switch that commonly goes out on vehicles, that...

How Does a Clutch Engage and Disengage?

The clutch is designed to engage and disengage the connection between the engine flywheel and the transmission input shaft. The clutch is operated by pushing on the clutch pedal inside the vehicle, which causes the clutch to disengage, and as...

Small fire under hood

Even small fires can cause a lot of damage, but the engine bay is designed to deal with high temperatures. Have an experienced mechanic, such as one from YourMechanic, come out for an inspection of all of the underhood components....

How much we would tail light socket and wiring cost

Hi there. It's possible that the issue you're having with brake lights is caused by either the brake light switch under the pedal, an electrical relay or the brake lights themselves. To know for certain what's causing this problem, it's...

White smoke coming out of hood when idle / stopped

This sounds unfortunately like a blown head gasket problem. The fluctuation in temperature and white smoke is usually a sign of this. I would suggest having the coolant tested for traces of combustion gases which will indicate if the head...

Noticed car leaking after alignment.

Hi there. It is not too common for a transmission service to cause a leak on this vehicle unless something was left loose. If there is a lot of fluid then the area needs to be cleaned and monitored to...

Related articles

Why Are 5W-30 and 5W-20 Oils So Common?
Changing oil is one of the most important car care tasks. Most cars use 5W-20 or 5W-30 oil because those oils work best in hot or cold temperatures.
The 10 Transmission Problems to Never Ignore
There’s nothing quite like transmission problems to stress out the average car owner. They are, at best, inconvenient and, at worst, very expensive. Proper...
How to Replace Transmission Fluid
Whether Whether you have a manual or an automatic transmission in your vehicle, the transmission fluid is one of the most overlooked fluids when it comes to maintenance. Forgetting to change this fluid can result in some serious issues such...