Skip the auto shop - Our mechanics make house calls

Q: Smoke coming out of tailpipe

asked by on

I have a lot of smoke coming out of the tailpipe. Furthermore, when I put the vehicle in drive and press the gas, the car shakes.

A: Hi there. Excessive smoke can indicate some...

Hi there. Excessive smoke can indicate some serious issues. The first thing to do is to determine the type of smoke that is emitted. A whitish smoke would indicate engine coolant entering into the combustion chamber. This can cause rough idle and you may notice that coolant is being consumed, a common cause is a failed head gasket, worst case scenario would be a crack in the cylinder head or block. A bluish, thick smoke would indicate oil is being burned in the combustion chambers. Also, faulty valve stem seals, excessively worn valve guides, or piston rings can also lead to rough idling. You may notice you have to add oil more often. If the smoke is black, this could indicate excessive or unburnt fuel. The fix could be as easy as an injector service or you may have one or more faulty fuel injectors or contaminated fuel. In any case, you may want to enlist the assistance of a mechanic, such as one from YourMechanic, to inspect the smoke issue and replace any failing parts.

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: Where is the Crankshaft Position Indicator on a 1998 Infiniti QX4?

The crankshaft position sensor is typically externally mounted on the engine near the crankshaft pulley. I would recommend checking near the crankshaft pulley for this answer. If you need help with the replacement of the crankshaft position sensor, I recommend...

Q: Car not on, wipers/horn sounded, smoke and fire started

Hello. Wow, that's sounds like a scary situation. If anything aftermarket has been added to this vehicle, then that may be the problem. Many people do not know the right way to add electronics to this kind of car. If...

Q: Hearing noise form tires when turning

This is an issue that comes up often on this vehicle. Most of the time it comes up if the vehicle is 4-Wheel Drive. If it is then the problem is typically caused by worn out CV axles. If the...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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.