Hi Scotty,

I have a 2020 Corolla LE, 1.8 L with 53k miles. I hadn't cleaned the injectors since I got the car with 39k miles on it, so decided to pour a 10 oz bottle of the Techron fuel cleaner in a near empty tank (remaining mileage said 10 miles at 25 mpg, so probably about 0.5 gallons left in the car) and filled it up. I drove about 80 miles and I feel like my acceleration is smoother, but I had an odd vibration when I was idling at a stop light. I was stopped for at least 10 seconds, when suddenly the car just started bouncing up and down for about 5 - 10 seconds and then it went away. I know you said as vehicles age the computers adjust for carbon buildup and such. Do you think the vibrations are just a byproduct of the cleaner getting the gunk out of the system and perhaps causing some kind of intermittent misfire to where the computer had to recompense? Thanks.