Wideband goes rich right after letting off throttle

[G. Wiffington]

Is it common for the wideband to go from cruising at 14.0s then when you let off of the throttle it goes rich like into 12s?

[Spunkster]

No it should not. When decelerating it should go fully lean.

[G. Wiffington]

Sorry I should have been more specific.

Yes it does end up going to full lean with no throttle but just right as I lift my
foot from the pedal if I was just cruising, the wideband will go rich for a second
then all the way lean like it should.

I was trying to chase the spot on the map, just thinking it was really rich on the
lowest fuel lines when looking in 2D. But, even then when pull a bit of fuel in that
area it still will get rich right after I left off throttle.

[Spunkster]

I wouldn't worry too much about this as this sounds pretty normal.

[frederic1973]

what is your version ?

[G. Wiffington]

Okay thanks Spunkster.

I will have to check when I get home on the Version, I do not have my laptop with me.
I am pretty sure it is up to date though.

I have had this going on for like 2 years or so. Never really worried about it I was just
curious if anyone gets the same thing.

[DaX]

I'm using a PLX wideband, and I also get a blip towards rich before going to "AIR" when letting off the throttle. Just sharing as a data point.

[crluver123]

this is fairly normal. It's basically the opposite of tip-in enrichment. Tip-in is when you quickly add throttle, the engine will naturally have a lean spike, and that's why tip-in enrichment adds a little extra burst of fuel for when you quickly add throttle. Quickly reducing throttle has the opposite effect; a quick rich spike, but there is no way to adjust for that and really no need to adjust for it either because it is not dangerous for the motor.

[G. Wiffington]

Thanks guys!!

I am glad I am not the only one.