N14 celect plus erratic idle

[Luckyjayb]

(08-28-2022 )SemiSweet Wrote:  I had one hunt at idle and the ambient pressure sensor was the issue. But didn’t move as much rpm as your stating. It was at a default pressure which didn’t change even when unplugging. Not sure if yours is the updated sensor which is much smaller and just zip ties to the harness instead of mounting on a bracket to the block to the right of the ecm. The wiring on those n14s can be terrible as well. Did you check or replace all the injector pass trough connectors and verify the harness plugs were not stretched out causing intermittent connection.

Checked them, ohm’d them, and even tried a new set. It’s a new harness on there but the old style sensor. The sensor is reading the correct barometric pressure but not ambient air temp. The intake air temp and pressure are fine and the coolant sensor is working like it should and is new oem.