Cm870 all stock surge
02-15-2022, (Subject: Cm870 all stock surge ) 
Post: #1
Smile Cm870 all stock surge
I have a truck with cm870 all original set at 475.Truck started to surge under acceleration. It throws no codes however if you disconnect the egr it runs fine in a silent derate. Ran turbo egr test and all pass . Replaced fuel filters no change. Checked fins/actuator on tubo all good. Just put a new egr valve on it and same thing. Egr cooler not leaking....any other ideas?
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Cm870 all stock surge - Hambone - 02-15-2022



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