I have a 2014 Mack Pinnacle CHU613 with Mdrive transmission , when the truck warms up it starts loosing throttle while driving coming to a complete stop at times. Also when making turns it’ll start bucking. It doesn’t throw any codes in the process. Had it to our local Mack shop several times and they can’t figure anything out. We’ve replaced the accelerator pedal 3 times, the gear selector, wire harness for trans, speed sensor, pressure test on fuel system and they said it was fine.
Has anyone experienced this? Or know what’s going on with this truck?
