Idle issue

[Dannyg]

Hi all

Recently replaced the battery and now I'm having idle issues, could be coincidence or related, sometimes it starts up and almost stalls then idles normal or stalls all together, only happens when I start the ignition it's fine when driving, any ideas? Ecu reset maybe

[djb55]

Had similar with an MX5, start it up and let it idle for approx 15 mins (I kid you not) it just needs to learn how to tick over again.

[Dannyg]

Ok thanks, was hoping it just needed to learn the idle speed, but wanted some advice before I book it in for a diagnostic