Ideas for rich on decel and a hard hot restart?

mazdadude

ZOOOOOOOOOM ZOOOOOOOOOM
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'16.5 Mazda CX-5 Touring
Upon deceleration from a spirited accel, I have some popping from the exhaust, and bumper around tailpipe is black.


Also had an incident where upon a heat soaked restart, after a 30 minute rest, the car acted as if it was flooded. Stumbling and stalling once restatrted and taking some throttle revving before it cleared its throat and idled and revved normally.

Has anyone here seen something similar?
 
Definitely sounds like you're running rich- anyway to view STFT and LTFTs? Aren't you at a relatively low mileage?
 
You clearly are aware it's running rich as indicated by your thread title... I'm an idiot.
 
With that being said- perhaps a leaking injector? Are you seeing black (unspent fuel) smoke on start up?
 
I was leaning towards a leaking injector or pressure regulator.

Current injectors have over 282,000 miles on them.

I have been running techron injector cleaner the last 2 fuel refills since the single occurrence start issue.
 
WOW, 282K... For some reason thought your car was a sub 50K car.
 
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