recently finished my rb25de+t conversion. Runs and drives perfectly - except after idling for about two minutes it shuts off like i have turned off the key, doesnt hesitate or run rough or blow smoke etc just turns off.
Since the problem came up i have done the following,
regapped spark plugs
cleaned and adjusted aac valve
checked battery terminals and terminals at both fuse boxes
checked every small fuse in cabin and boot
extra info for you which may help, im using the following parts
stock gtst ecu
stock 25de afm
missing oxy sensor and light is on dash
doesnt have an immobiliser.
i cant think of anything that would shut it down so plain witout and issues or rough idling.