Hi!
I am running VEMS 3.8 with the newest firmware (as of 2016-11-24 -- sorry, cannot point out the exact version right now) on my daily driver. It is a BMW M52 engine -- not that it matters.
Now, to the problem. I have set over run fuel cut to kick in while decelerating in gear just to improve fuel economy slightly.
The parameters I can set there are:
* Fuel cut below kPa
* Fuel cut above rpm
* Fuel return rpm
* Fuel cut delay
So far, I have set it up to kick in almost without any delay (0.1s) over 1500 rpm, and return fuel at 1100rpm. What I have seen is that sometimes I actually start decelerating even lower rpm and the fuel cut does not kick in. So, I took the approach to lower the 1500rpm to about 1300rpm.
But when the fuel cut starts over 1300rpm, it also kicks in when the idle for what ever reason (usually after a cold start) reaches 1300rpm. I do not want that to happen!
Is there something else I can configure for the fuel cut not to kick in when idling. With Megasquirt I know I can set the kPa limit under which the fuel cut should kick in, but currently with VEMS the "fuel cut below kPa" works as a separate function -- whenever the rpm is below currently set 18kPa, it cuts the fuel. It has nothing to do with the rpm nor TPS position! My car idles at about 25kPa the lowest, it never comes down to 18kPa.
Also, the TPS is set up correctly and shows 0% when the throttle is depressed. CL Idle is activated under TPS less than 0.39% or something like that, and works well.
As always, the story became rather long, but maybe there is someone who is willing to read the issue and give it some thought.. Thanks for any feedback and ideas!