Cold advance high idle 1152

[DLippert]

Hi, my Humvee starts fine but it doesn’t seem to go on high idle when it’s cold (30 degrees) or below. I changed the temperature sensor on the rear of the motor. Also unplugged the solenoid and put 24v to it. It clicks and I notice a very little up tick in the idle. Is it possible that the solenoid is not working rite (wore out)? I also did push on the throttle peddle to set the idle. Did nothing. Any help would be appreciated thank you.

 

[Mogman]

Hi, my Humvee starts fine but it doesn’t seem to go on high idle when it’s cold (30 degrees) or below. I changed the temperature sensor on the rear of the motor. Also unplugged the solenoid and put 24v to it. It clicks and I notice a very little up tick in the idle. Is it possible that the solenoid is not working rite (wore out)? I also did push on the throttle peddle to set the idle. Did nothing. Any help would be appreciated thank you.

I don't think it is a high idle just allows it to keep running at idle until it warms up, if not working the engine will die instead of idling when cold,
IIRC it just advances the timing, why it is called a cold advance.

 

[Retiredwarhorses]

Hi, my Humvee starts fine but it doesn’t seem to go on high idle when it’s cold (30 degrees) or below. I changed the temperature sensor on the rear of the motor. Also unplugged the solenoid and put 24v to it. It clicks and I notice a very little up tick in the idle. Is it possible that the solenoid is not working rite (wore out)? I also did push on the throttle peddle to set the idle. Did nothing. Any help would be appreciated thank you.

Your CSA is automatic, nothing is done at the pedal to set it, the solenoid pushes a pin that opens and closes a ball in the valve
to change head pressure, thus advancing the timing a few degree, the CSA is engaged anytime below 120 degrees, you hear the CSA expire when the tone of the motor smooths out and less “clacky”, it doesn’t affect idle speed.

 

[DLippert]

Your CSA is automatic, nothing is done at the pedal to set it, the solenoid pushes a pin that opens and closes a ball in the valve
to change head pressure, thus advancing the timing a few degree, the CSA is engaged anytime below 120 degrees, you hear the CSA expire when the tone of the motor smooths out and less “clacky”, it doesn’t affect idle speed.

Your CSA is automatic, nothing is done at the pedal to set it, the solenoid pushes a pin that opens and closes a ball in the valve
to change head pressure, thus advancing the timing a few degree, the CSA is engaged anytime below 120 degrees, you hear the CSA expire when the tone of the motor smooths out and less “clacky”, it doesn’t affect idle speed.

So it’s working as it should? I thought it would idle higher