Hi All,

I am currently having trouble with my s2000 engine idling after a cold start. Every time I cold start the car and drive for ~5min, I pull up to a stop and my idle flutters/does not drop. Here are a few videos I took of the engine, cluster, AFR gauge:

Engine: https://streamable.com/qjt8xb
Cluster: https://streamable.com/4uye6v
AFR: https://streamable.com/oj8ig4

I honestly have no idea where to start to try to figure out this issue. Once I turn the engine off and back on, the fluttering doesn't show back up. OR, if the engine is warm, it doesn't show up.
Engine specs:
-all stock internals
-TCT
-Radium fuel rail
-Megasquirt EMS tuned by Blacktraxx - they have said it is not related to the tune.

 

Dang, no suggestions?!

Is this posted in the wrong section?

 

Just curious, did you ever solve what was going on? Mine flutters on cold start ups sometimes and ive already cleaned the iac valve.