Upshift AFR Querrey

[WildHorse]

If you guys with 15-17 MT82 GT could check if your AFR goes to 20:1 on a up shift that would be great. Thanks.

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[Cory S]

It's not supposed to.

 

[W.O.T. Stang]

If you guys with 15-17 MT82 GT could check if your AFR goes to 20:1 on a up shift that would be great. Thanks.

Are you confusing upshift with downshift? When you go from 3rd to 2nd and coast - you are going to see see 20:1 - as the engine goes lean as the injectors shut off, and sees full vacuum with the throttle plate closed.

IF you are seeing it on acceleration - which i cant see how - you have many other issues and would most likely be seeing drivability issues and a check engine light at minimum.

 

[WildHorse]

Are you confusing upshift with downshift? When you go from 3rd to 2nd and coast - you are going to see see 20:1 - as the engine goes lean as the injectors shut off, and sees full vacuum with the throttle plate closed.

IF you are seeing it on acceleration - which i cant see how - you have many other issues and would most likely be seeing drivability issues and a check engine light at minimum.

No not confusing upshift/downshift
upshift: 2nd to 3rd gear
downshift: 3rd to 2nd gear
The upshifts goto 20:1 for a instant, then normalize. Downshifts does the normal downshift crap.

 

[Cory S]

Are we talking super slow granny shifting?

 

[WildHorse]

Are we talking super slow granny shifting?

Not super slow. Just mundane normal shifting BS.

 

[Cory S]

Not super slow. Just mundane normal shifting BS.

Does it do it above or below a certain speed?

 

[WildHorse]

Does it do it above or below a certain speed?

Just when I normally shift. 15 kph 30 kph 45 kph 60 kph those points ate between 2k to 3k rpm

 

[K4fxd]

It's your DFCO settings.

 

[WildHorse]

DFCO

?

 

[Mghoward74]

Decel fuel cutoff. It’s used to save gas/fuel

any time you coast (not in gear, AFR/lambda) will show lean conditions

 

[WildHorse]

Decel fuel cutoff. It’s used to save gas/fuel

Even on a upshift ?

 

[Mghoward74]

Even on a upshift ?

Yes

 

[WildHorse]

Yes

Sweet. Thanks all for the responses .

 

[K4fxd]

Decel fuel cutoff.

Even on a upshift ?

yes

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