0
0
0
I'd like to know if anyone has had any issues with a M978A4 HEMTT going into high idle or why you go to engage the high idle in the back when you are pumping fuel and it won't idle up. Then when you look that the panel in the cab and the high idle is lite but it's not turned on.
Posted in these groups: 
92F: Petroleum Supply Specialist
92F: Petroleum Supply Specialist
Posted >1 y ago
Responses: 2
0
0
0
Double check to make sure transmission is in neutral. If it is in gear, high idle will not engage from the rear of the truck even if switch in cab is on.
(0)
(0)
0
0
0
Had issues with this in Germany, once the A4's took over our mechanics were on over drive trying to break this issue down. Ended up being the switch. Not sure if it was contacts, or wiring, but that'll be your source. If nothing there, check the throttle plate and wiring to see if something is wrong there.
(0)
(0)
Read This Next
Continue with Facebook 
Continue with Google