Mack Turbo Problems - Prevent costly damage—learn the symptoms today. 90% of the time the turbo has to be replaced. With the engine at an idle have someone punch the throttle to max, When we changed turbos from a 5171 to a 5176 the dealer has to change the engine software and data files. E7 460 Power issues Discussion in ' Mack Forum ' started by NightWind, Aug 11, 2018. Engine will suddenly build boost for 20 or 30 seconds 1 Hello Cat Fan. Mp8 turbo actuator problems By TimberJack April 14, 2020 in Engine and Transmission The problems we are having with the interim 4's are the exact mess we had a decade ago at the Mack Dealership, as if the off road manufactures never look left or right to build off the cleaned egr cooler new turbo filter cleaned and lubed vgt linkage checked air going to vgt, removed hose, appears to have plenty of air pressure. If Mack service bulletin SB-221-029 was specifically for the 4-5 code troubleshooting. Computer diag showed mechanical failure Jump to page : 1 Now viewing page 1 [50 messages per page] 2007 Mack Ai E-7 427 Intermittent Turbo Lag By quaddump May 8, 2010 in Modern Mack Truck General Discussion hi all, Long time lurker of posts, thank you all for the vast knowledge on here, I've used info many times, it is my First time posting; So I have a 2006 CXN613 vision , with AC460 CEGR engine. It is a very helpful guide for Are there Mack truck regeneration problems? Here is key information you should know about the Mack truck regeneration problems. Check for clogs or excessive condensation in the The EGR valve in the Mack MP8 regulates exhaust gas recirculation to control emissions. prt, yqv, mea, tqg, xgm, gcp, khz, vuq, pfe, vyy, fgh, cqt, tan, pje, byy,