3sgte Runs Slightly lean on hot start Options

[bsamps4]

Guys I've noticed over the past few weeks that when I start my car after driving it a few minutes prior (drive to grocery store, get groceries, get back in car and drive home) that the motor will run a little lean (between 15-16 afr ratio), and after a minute of driving everything will return to normal (between 13-14afr while idling and driving without boost). Anybody else experience this issue. Just seems a little odd. The motor doesn't sound funny while doing this, but it's just a question that I've had stuck in the back of my head for some time now.

[lagos]

Guys I've noticed over the past few weeks that when I start my car after driving it a few minutes prior (drive to grocery store, get groceries, get back in car and drive home) that the motor will run a little lean (between 15-16 afr ratio), and after a minute of driving everything will return to normal (between 13-14afr while idling and driving without boost). Anybody else experience this issue. Just seems a little odd. The motor doesn't sound funny while doing this, but it's just a question that I've had stuck in the back of my head for some time now.

Thats not "lean", its stoichiometric air fuel ratio for gasoline. At idle and cruising you should be at AROUND 14-15 afr.
http://en.wikipedia.org/wiki/Air%E2%80%93fuel_ratio

If are getting 13 afr at warm idle or cruise, then your o2 sensor may need to be replaced because its not doing its job of keeping the afr between 14-15