I recently noticed the AC idle mechanism doesn't work on my 1HDT (HDJ81). I pulled the hose and noticed a metal valve inside. This end of the hose attaches to the idle up actuator next to the injection pump. I asked a buddy to verify if his 1HD-T has that metal piece and his does not, its just a simple hose.
Question is: what is this exactly? It looks like a schrader valve but I wonder if maybe its just preventing a vacuum...The idle up actuator does not have a hexagonal shape where the hose fits so surely this can't be right...
Question is: what is this exactly? It looks like a schrader valve but I wonder if maybe its just preventing a vacuum...The idle up actuator does not have a hexagonal shape where the hose fits so surely this can't be right...