Chmack 400
-
Posts
1 -
Joined
-
Last visited
BigMackTrucks.com is a support forum for antique, classic and modern Mack Trucks! The forum is owned and maintained by Watt's Truck Center, Inc. an independent, full service Mack dealer. The forums are not affiliated with Mack Trucks, Inc.
Thank you for your support!
Ch mack 400 problems
in Modern Mack Truck General Discussion
Posted
I have a ch mack 93 with 400 hp bosch german injector pump style engine . it misses now and then under load . we have put an electric lift pump on main fuel line it makes it a little better but still plays up and bypassed lift plunger on pump but still does it .am guessing injector pump is buggered and can i put i higher rated hp pump from same model engine and not have to change anything ? I been told a 427 one will work