Momentarily lean situation

[Vereeken]

Not sure how many Innovate LM users are on this board.

I am running for some time now with my LM connected to find the reason for a slight stumbling at 2.000 rpm.

While doing this I have noticed that my AF ratio goes leaner when I floor it in any gear. This leaning out is only there for a second or two then it goes to WOT enrichment.

So assume I am coasting at 13.6 and floor it i would get 14.8 for a second or two maybe three and then she goes to 13.1 high 12's.

BTW, the stumbling does not come into play in this scenario. The stumbling only is present when coasting at light engine loads.

Has anyone experience with this temporarily "leaner" situation. Maybe this is normal operating procedure. I can only assume that the throttle plate sucks in more air and the Fuel Distributor is lagging behind in upping the fuel.

This is for a 911 SC ROW so no Lambda loop present. Also the diverter valve is no longer present.

Thanks for any feedback.