BWDudeBro
Seasoned Member
Hey folks,
Have been meaning to do an intro thread for a while (but this isn't how I wanted it to look). Picked up my "used" '23 4BW 6MT with 300mi in June, and 6 days later a nice old lady backed into me which put it in the shop for 3 months, but I digress...
Last night i was ~ 25min into a completely normal drive of stoplight to stoplight driving with heavy-ish traffic. No hard pulls, the car was fully up to temp, and all gauges looked good. I pull into a turn lane to make a turn, and when I take off the car is very stumbly and hesitant. It was hard to tell how much was the real engine noise vs. fake engine noise, but things got very loud and "groany" without having any discernible source (as in, couldn't immediately tell if it was engine, transmission, or even something like a badly dragging caliper).
There were no CELs, which I full expected. If it had thrown one, I would have suspected the wiring issue that's documented elsewhere on the forum. As it was, it felt almost like the car was running on 4 or 5 cylinders. Accelerating would induce the loud, groany, and down-on-power experience.
Over the next 10 min and few miles, it steadily cleared up. Once the noise was gone, it might have felt like it was still slightly down on power? But hard to tell... so about a mile later at the next on-ramp I did a 2nd gear pull with maybe 70% throttle up to maybe 5500rpm. Everything was fine. By the time I got home 20min after it started, the car was completely normal. Good temps, no lights.
I shut it down and still made my appointment. About 3.5 hours later, I got home and fired the car up to read it with the OBD2 scanner. Car was completely normal and happy and there were no codes. I let it run for 1-2min and shut it down. Checked oil, and it was clean and full.
My current theory is bad gas. The car is completely stock with 2100 miles. I did a break in change at 1300mi and Blackstone said the oil was great and normal. It does sit a bit, but nothing crazy. I believe it was driven 5-6 days prior to this.
Before I make an appointment at the dealer, I wanted to poll the brain trust first. Anyone experienced anything like this? Thanks in advance!
Have been meaning to do an intro thread for a while (but this isn't how I wanted it to look). Picked up my "used" '23 4BW 6MT with 300mi in June, and 6 days later a nice old lady backed into me which put it in the shop for 3 months, but I digress...
Last night i was ~ 25min into a completely normal drive of stoplight to stoplight driving with heavy-ish traffic. No hard pulls, the car was fully up to temp, and all gauges looked good. I pull into a turn lane to make a turn, and when I take off the car is very stumbly and hesitant. It was hard to tell how much was the real engine noise vs. fake engine noise, but things got very loud and "groany" without having any discernible source (as in, couldn't immediately tell if it was engine, transmission, or even something like a badly dragging caliper).
There were no CELs, which I full expected. If it had thrown one, I would have suspected the wiring issue that's documented elsewhere on the forum. As it was, it felt almost like the car was running on 4 or 5 cylinders. Accelerating would induce the loud, groany, and down-on-power experience.
Over the next 10 min and few miles, it steadily cleared up. Once the noise was gone, it might have felt like it was still slightly down on power? But hard to tell... so about a mile later at the next on-ramp I did a 2nd gear pull with maybe 70% throttle up to maybe 5500rpm. Everything was fine. By the time I got home 20min after it started, the car was completely normal. Good temps, no lights.
I shut it down and still made my appointment. About 3.5 hours later, I got home and fired the car up to read it with the OBD2 scanner. Car was completely normal and happy and there were no codes. I let it run for 1-2min and shut it down. Checked oil, and it was clean and full.
My current theory is bad gas. The car is completely stock with 2100 miles. I did a break in change at 1300mi and Blackstone said the oil was great and normal. It does sit a bit, but nothing crazy. I believe it was driven 5-6 days prior to this.
Before I make an appointment at the dealer, I wanted to poll the brain trust first. Anyone experienced anything like this? Thanks in advance!
