My 2012 Buick Enclave 3.6 V-6 did that - ran rich for about 30 seconds on a cold start - smoked a little black and had a strange exhaust note too - cat light-off was the reason, as you have found.
and now for something completely different
If enough geezers forget to push the start button to shut down when done driving, the NHTSB will probably mandate an
interlock that will lock the doors until you shut the engine down. Think I'm kidding? The fed gov nannies never sleep.
Damn the...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.