Cm570 hesatation underload

[AussieISX]

(11-05-2017 )Red Wrote:  Hi all I have a western star 4900fx with a cummins cm570 it has intermittent hesitation under load the power drops off and then back on as quick as a light switch. Any one know if fuel solinoids will do this ?

I doubt it is solenoids/ actuators. Does it completely drop power or just limit it . Does it do it in all gears or only lower ones ?