TP / Idle control

[Tim D]

I've lived with a weird idle control situation for some time and decided to capture a log to see what's happening. 

When driving 'normally' and coming to a standstill, occasionally the engine speed will suddenly jump up a little.  It's no big deal, I'd just like to resolve it.  

It appears that despite AP being at zero, the TP jumps up for some reason.

See screenshot, tune and datalog below:

Screenshot:

https://drive.google.com/file/d/1AXVKoc_vjqeM8Qq-3aWgT_zJsY37zymf/view?usp=sharing

 

Tune:

https://drive.google.com/file/d/14fVHTdeCB9rt0rWP9-6zm887joFViK-H/view?usp=sharing

 

Log:

https://drive.google.com/file/d/19VgWmXtzkCxHAdn5JETEF13VTIuqy5xd/view?usp=sharing

Any help would be appreciated?

[Vaughan]

had a quick look and it happened when you moved from the idle control being locked out by your vehicle speed to being in closed loop idle control, the blip is the 2% idle base position being applied then after 2 seconds the closed loop idle kicks in and pulls the idle speed down.

To fix it consider reducing your ISC Base Position values in the 80-100deg c range

[Adamw]

With E-throttle idle control the base position table should be near zero at normal operating temp, the main idle throttle opening required should come from the main E-throttle target table.  

So you need to subtract about 1.5-2.0 from all the numbers in your base position table and add 1.5-2.0 to the top row of your E-throttle target table.

[Tim D]

Thank you for the suggestions, much appreciated.