wes459

So the car is at the Merc dealer here in Cary, NC while I'm up here for work. I'll preface the issue with this:
I bought a new battery this weekend, and the VR is about 3 months old. I havent gotten any codes, but didn't want to get stranded on the way home.

I've noticed a pulsing of my electronics in the past 2 weeks, and now it is slightly affecting idle, like I have some big cams or something. Driving down the highway my gauges and lights have a fast pulse to them but when I get to a stop light it slows greatly and rpms rumble between 450-600 with a slight stumble. My voltage reads between 13.8-14.8 when it does this and 14.1-14.3 on the highway. I was thinking maybe a new VR is needed, but the dealer just called and said they tested that first and it was good.

I'm kind of at a loss right now and waiting to hear back from the dealer is really not making me feel very good... Any ideas?

shardul

iTrader: (1)

Battery control module?

novae500

did both batteries get replaced? One in the trunk and one under the passenger cabin filter?

wes459

I didn't replace the front, just the rear battery...

Shardul I've not really read that much on the BCM, guess I need to do some research.

harjothundal

I had this issue with my vehicle. It was the VR. After installing the new VR, the issue was resolved for a few months. The issue came back, and after a short while, the actual alternator was dead and would not produce any output. I purchased and installed a new alternator, she's been running strong since.