1991 Cadillac Deville dark smoke

14,100 MILES • V8 • FWD • AUTOMATIC
Avatar
TAYLORE4
  • MEMBER
  • 1 POST
my car blows dark smoke out the tail pipe and smells of gasoline.
May 24, 2009 at 9:44 PM
Advertisement
Avatar
RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Typical symptoms of an engine that is running rich (too much fuel, not enough air) are poor fuel economy, elevated emissions (Carbon monoxide or CO), and engine may have rough idle or surge condition.

Possible causes include a bad O2 sensor, excessive fuel pressure (bad fuel pressure regulator or plugged return line), leaky fuel injectors, dirty air filter or restricted air inlet, or a defective coolant sensor that prevents the engine management system from going into closed loop mode
May 24, 2009 at 10:30 PM
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Frequently Asked Problems for This Vehicle