auto idle malfunction

ottdan

New member

Equipment
KX121-3
May 20, 2015
1
0
0
Ottawa
Hi

I have a 2006 KX121-3 excavator with an non-functioning auto idle. When the auto idle switch is on, the engine should automatically idle down after 3 seconds of no activity. What happens now is that the engine idles on high as soon as you try to set it with the nob and stays on high no matter what. I've replaced the in-cab idle switch component thinking that that would do the trick but the issue persists. I've searched the web and have drawn a blank on this issue. At this point, I'm looking for information that would give me details on the components that make up the auto idle function on this excavator. I'm hoping I can troubleshoot it from here if I knew what all the pieces were involved.

Thanks.
 

MadMax31

Member

Equipment
BX23S, 60" MMM
Nov 5, 2014
766
8
18
New York
On every engine driven welder Ive run, a solenoid is what kicks the engine up to full R's. Id imagine its similar in theory. Check for loose/cut wires?