Discussion Starter · #1 ·
Some nights when it gets cold out after a warm day (say 65 degrees down to 40 degrees) my car will rev up and down like 5 times and then settle into it's normal range of 750-ish or so RPM. It seems like it bounces between 700 and 1000 RPM back and fourth a few times. Does anyone else experience this? It doesn't happen often, but it seems to be when the temperature differential is large from day to night. Any ideas?