I haven't had time to do any proper pulls or logging, but wanted to fish around for some opinions here to put my mind around it.
I had an errand to run on my way into work this morning and when I started my car up and sat for a bit to send an email, I couldn't to help but notice an new pattern to my engine's idle I hadn't noticed. Before I stopped to run the errand, my engine had come fully to temp and drove fine, as usual. When finished with the errand, I sat in the car for a bit, engine off with radio and accessories on (maybe a half hour) and was alerted to the battery having discharged. I started it up as I did need to get to work, it was a bit slow to do so. The engine had cooled of a bit as it was in the low-40s, but that's when I noticed the idle pattern. Here's a short log at idle before I pulled off:
https://datazap.me/u/mcsweeto/pulsin...22-23-24-25-26
The RPMs were noticeably pulsing. It stuttered a bit and felt a little underpowered pulling of. Maybe this had something to do with the battery drain, but here I am.