Skip the auto shop - Our mechanics make house calls

Q: Possible EVAP leak?

asked by on

About 6 months ago my engine light came on so I took it to get a computer read out of what the problem might be. It came back with three different codes so they couldn't tell me for sure what was causing it, When sitting at a stop sign it seems to emit a lot of smoke. The vehicle is running great aside from this issue and I really would like to get it fixed. Any ideas??

My car has 97000 miles.
My car has an automatic transmission.

Hello! Typically an EVAP leak will not cause the engine to run the way you described or cause smoke to come from the tailpipe. However, an EVAP leak can cause the check engine light to come on and set a code. As for the smoking, I would need to know what the smoke looks like.

If the smoke is:

  • Black: it may have a fuel issue caused by a bad sensor or a leaking injector.
  • Blue: it is burning oil.

This engine has a terrible history of piston ring failure resulting in the cause of the smoke. An engine rebuild would be required should this be the problem. I usually do a compression test to verify this. If you want to have the engine checked out by a professional, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose the smoke issue.

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: Just changed my car resanator but it's getting really hot

The resonator in the exhaust system will reach a high operating temperature. If the part is new, there will be a brief initial period during which coatings on the steel case may burn off and that may give the impression...

Q: At light on and car stalling

The AT Light is indicating a fault with your transmission. The transmission in your particular vehicle has its own computer that can self diagnose issues it may be having. A qualified technician, like one from YourMechanic, could retrieve any stored...

Q: Gasket or main seal leaking oil.

There are dozens of places where oil leaks can originate. The rear main seal and head gasket are just two of the possibilities. I suggest you have dye put in the oil system to determine where the leak is coming...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...