Thanks, guys, for your help. It did turn out to be the pedal, which in Los Angeles was around $13. I took it to my trusted mechanic where it was attached, after which I had an oil change with a very good oil... the French oil, Motul.

The new accelerator pedal is much smoother in operation than the old one, pre-break. And my engine likes the Motul. It's smooth and humming, even though I need one new injector... the next thing on the list

If you're ever out in Los Angeles I highly recommend Renner Motorsports in Inglewood.