Change the alternator and battery on my
Camry now when you start it the RPMs an
idol go real low up-and-down sounds like it’s
going to stall but never does. Happens every
time I stop but also while it’s in park. we
checked for vacuum leaks, we turned the
idle up a little bit, same results.
check your work , scan for codes and get the definitions , sounds like a IAC valve thing or something else that may have gone bad when you did the work by pure coincidence