To summarize, the following procedures must be used to correct an engine misfire as described above: Contact your DSM and request to have the engine ECU data file activated. Use MackNet to download the engine ECU service data file from the MACK Mainframe. Program the engine ECU with the new service data file.. Yeah the ole E9 V8 and the mechanical E7 powered Mack's were their best engines ever. When they went to the electronics they have had problems. I hear their new MP engines are great and have far less problems. But you got to remember everyone else had problems when they went to electronics too but Detroit was ahead of the game by a few years so.
Odd Noises. One of the most common issues you may face with the Mack E6 engine or E7 engine is the odd noises.. When running, a semi-truck motor is expected to create noise. However, you should pay attention to the sound you hear because a loud, continuous knocking sound or a lawn-mower-like noise is abnormal.. It can indicate that its component is experiencing wear and tear or a problem with.. Mack 4.17 and 4.64 respectively . Been good trucks. Also some CXU MP7 395 hp. with Allison autos. Have been excellent trucks except for the Mack DPF. Over all the E7 was a great engine except the EGR attempt on the ASET and cam follower issues and some expensive VGT turbo problems.