Scotty, it is ever a good idea to replace a modern car throttle body just to see if it helps make an older car run better (after other maintenance things like spark plug and filter replacements are done)? I replaced the throttle body on my daughter's 2015 Dodge Journey Crossroad 2.4L (automatic with 85k miles) due to codes (in March 2020; and forgot the codes it set), and after I did the reset I noticed a big difference in how well the engine ran. Then I felt I had to repeatedly warn her that the vehicle was running and she might not know it because it was idling so quiet and smooth! I did notice that the idle RPM changed from 800 to 700 after replacement. But, all the vibration and rocking of an older car engine were gone. I bought a medium Rockauto priced $137 part: (CARDONE 677002 {#4891735AC, 4891735AD} Economy Remanufactured; includes the throttle position sensor).

I'm thinking of replacing the throttle body unit on my 2011 Chevy Equinox 2.4L (automatic with 112k miles) which I do a fair amount of preventive work on. I have a high level of skill/experience working on cars, etc.