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]

yeah I generally get a 12-13 on a cold, and idle usually 14-15... however I do sometimes while idling the car will slowly drop to a low 16-18 range... which is a little annoying. but doesnt do it often and a little tap on the gas fixes it.

Kevin

Those small dips into the 16-18 range normally indicate a very small vac leak somewhere in your setup.
Most people don't realize this, but a wideband is a far better way of noticing vac leaks then your actual vac gauge.