cold start issues

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I like the brevity here. :nice:

Tell him:

Mussssssst........ Pulllllllll......... Coooooooooodes.......... Caaaaaaaaaaptain.

Consider that the IAC might be dirty. If he holds the gas pedal down, does it stay running?

Good luck.
 
What codes did you get exactly? If you got no codes at all, there's an issue with the self-diagnostics.

Next up would be to check the calibration of the ECT when the engine is cold. The check if giving it gas helps - that can indicate the IAC is having issues.