Engine shuts down randomly
Some days ago, I parked the car in the garage, left the engine running, while I went into the house to quickly pick up some stuff, when I got back into the car, the engine was not running WTF, didn't care much, and started the car, it started normally, and left, everything seems normal, acceleration out of boost, and on boost, doesn't stall.... but then waiting for a green light, the engine just turned it self off!!, no bogging or anything it did it just like if I turn the ignition off, it was idling perfectly.
Now it happens when:
-The engine is at normal operating temperature, it doesn't happen while its cold.
-After idling for like a minute.
Things I notice:
-The AFR's are perfect on idle, but then go super rich for less than a second before it shuts down.
-When it is not idling the car runs perfect, with perfect AFR's
-I checked with the nistune and I dont notice any sensor without voltage or something before it shuts down.
-Sometimes it doesnt shut down, but the idle bounces from 500rpm to 1500rpm for like 6 times, then stabilizes.
Thanks for any input..!!
Now it happens when:
-The engine is at normal operating temperature, it doesn't happen while its cold.
-After idling for like a minute.
Things I notice:
-The AFR's are perfect on idle, but then go super rich for less than a second before it shuts down.
-When it is not idling the car runs perfect, with perfect AFR's
-I checked with the nistune and I dont notice any sensor without voltage or something before it shuts down.
-Sometimes it doesnt shut down, but the idle bounces from 500rpm to 1500rpm for like 6 times, then stabilizes.
Thanks for any input..!!