Voltage issues

[jonezybones927]

I drive a 2020 5.7 1500 with an E-Torque. The bearing on the e-torque went bad at 77k. Part was on back order until June. I ordered the bearing and rebuilt it myself. Now when I start my truck it reads 14.2-14.7 volts. As soon as I give it heavy acceleration like merging on to a highway. The voltage drops to 12.5 and continues to drop as if the alternator isn’t working, but when I shut the truck off and restart voltage goes back up to 14.6. Happens every time within the first mile of driving. Any thoughts?

 

[ryanJ]

I’m having the same issue, how did you fix this?

 

[fishslayer]

I believe the e torque MGU s must be made in China by 8 yr old kids..they are junk as far as Im concerned..Ram replaced mine last summer..its already faltering with wild charging rates. 12.6 to 14.5 while just driving along

 

[Tyee]

On the E torque systems the mgu operates at 48 vdc. The 12 volt battery is charged from a 48 vdc to 12vdc battery charger (no alternator ) What would cause the voltage fluctuations could be; limited output of the charger, a bad connection, or a battery that is not completely charged or failing.

 

[fishslayer]

New battery, new MGU generator all installed and tested by certified Ram technician..Its doing exactly the same thing the original MGI did. Took about 6 weeks to completely stop charging...its the MGU. again

 

[RebelliousGt]

I have 65,000 km + on my 2022 rebel gt. Had my 12 v battery start acting funny last year and they replaced it. No issues since. I think is a crapshoot for the mgu’s. Some never have issues and others are early in the milage game.

 

[RebelliousGt]

I have 65,000 km + on my 2022 rebel gt. Had my 12 v battery start acting funny last year and they replaced it. No issues since. I think is a crapshoot for the mgu’s. Some never have issues and others are early in the milage game.

I have 65,000 km + on my 2022 rebel gt. Had my 12 v battery start acting funny last year and they replaced it. No issues since. I think is a crapshoot for the mgu’s. Some never have issues and others are early in the milage game.

Another person I know traded in their 2019 Ram with etourqe at 178,000 without any issues and upgraded to a 2024 etourqe two years ago, he’s got 73,000 km on it now without a glitch.