N14 celect plus erratic idle

[schISM]

(08-28-2022 )Luckyjayb Wrote:  I’m getting the correct ambient air pressure though

I’m not familiar with the N14 but the ambient air pressure is only sourced from the barometric pressure sensor(on an ISX). The ambient temperature is a separate source usually provided by the OEM. So you could have correct ambient air pressure and a malfunctioning ambient air temp. circuit.