Blue smoke smelling unburned fuel

Tiny
PHINEAS
  • MEMBER
  • 2002 BMW 320
  • 1.8L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 12,000 MILES
Hi, I have a BMW e46 it is producing a blue smoke smelling unburned fuel. What would be the reason?
Thursday, September 6th, 2018 AT 11:56 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Hi and thanks for using 2CarPros.com.

Blue smoke from the exhaust indicates oil being burned in the combustion chamber. The unburned fuel smell may indicate too much fuel being injected which can be the result of many things.

Take a look through this link. It discusses causes and ways to repair. Also, if the check engine light is staying on when running, have the computer scanned to find codes. Most parts stores will do it for free.

https://www.2carpros.com/articles/excessive-smoke-coming-from-the-exhaust-pipe

If interested, here is a link showing how to use a scanner:

https://youtu.be/YV3TRZwer8k

Let me know if this helps or if you have other questions.
Take care,
Joe
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Friday, September 7th, 2018 AT 6:19 PM

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