Skip the auto shop - Our mechanics make house calls

Q: After sitting overnight, white smoke when car starts

asked by on

I have found that the parts for my car are rare and it has a motor different from most other cars. My problem is when the car has been sitting for over two hours, or overnight, when you start the car there’s a very white smoke that it spits out for about 10 seconds, then it disappears. It doesn’t smell like gas or antifreeze and I just can’t figure it out. Is what is causing this because this is a supercharged car and if that’s not it, what is the problem?

If it isn’t grayish or blueish, then its just steam and it’s nothing to worry about. Even if it is grayish / bluish, thats a little bit of oil burning, which wouldn’t be all that surprising for a 15 year old supercharged engine. Could be slightly leaky valve guides, but if it only occurs during start up and only for a moment, I wouldn’t sweat it too much. If you feel that engine performance has been compromised, you may want to have an expert, like one from YourMechanic, inspect the smoke and let you know if actions are needed.

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: At green light, accelerated, engine revved, but car barely moved

Hello. It sounds like that there was a glitch inside the TCM, known as the transmission control module. There is a TCM update available for your vehicle. Call your dealership to see if the update has been done already or...

Q: Screen is white & blinking on small screen navi

Simply disconnecting the battery should not have any adverse effects on the vehicle. The exception to this is if the battery was hooked up backwards, this could cause strange electrical faults. The most likely cause would be a wiring issue,...

Q: joe what the fuck is wrong with my car

Hi there: Overheating problems can be caused by a water pump that is faulty, coolant lines with obstructions or air bubbles trapped or leaking coolant levels. The best way to determine the precise source of your overheating issue on your...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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.