chugging

I have a 2016 Regal (2.0) with just over 40K miles. In fact, it's probably one of the last out there with remaining powertrain warranty from GM. I recently did a round of maintenance on the car myself, including: new spark plugs (OEM), new engine air filter (OEM), and cleaning the throttle body...

Hey everyone, I just picked up a 1981 Buick riviera 5.0L v8 (308) engine. It starts up and idles fine and it accelerates fine but after I'm accelerate say for example: just jumping on the highway accelerating from 30-65 it's fine but when I quit accelerating and try to keep it steady at 65 it...