2x issue with my NA
 

Hi all, it would be great to have some of your input on an issue now that my 1.6 NA is running on standalone ME221
This only started to happen after installation of the ME221 & AEM wideband:

On cold start, the idle won't stabilize, keeps jumping approx. 700rmp, dropping down to minimal idle and repeats. Car is difficult to drive on low rpm speeds.
After warmup, the issue is gone and throttle response is normal as well.
I uploaded the 1.6 base map, setup standard things like wideband etc.
My first idea was that is should be related to idle control valve but I am looking forward to your ideas on possible root cause.

Second issue was already noticed before swapping to standalone:
sometimes after driving on cruising speed, when i suddenly want to accelerate the engine stutters and holds back for a few seconds before releasing power and starting to accelerate.
With wideband now installed I can see a 20:1 peak when engine stutters so I feel it could be fuelpump or injector related.

Like to know your opinion on these both issues and what things I can investigate.

thanks for your support people!

Your first issue is going to likely be related to the cells upon which your cold idle is fueling at, your idle valve position, where your timing is in the effective cells, and whether close the loop idle is on or off at a given temperature. The second issue is related to acceleration enrichment. Neither is diagnosable without a log, there aren’t a lot of people here on the ME221 so you may be better off posting these questions with a log on a forum that has better support.

Thanks so much Jamikins!
I will take your mentioned causes along and look into those.

Logging is indeed a solid next step to do