Hello,

I have a 97' Camry LE 4 cyl (117 K Mi), and sometimes when I come to a stop the engine idles ruff. The RPM gage does not stay even at 600 or so. It moves up and down. I read through the board and saw a post about cleaning the throttle body so I did. I also replaced the plugs, wires and PCV valve too. The engine is smother now, but sometimes it slips back to the rough idle from time to time.

Am I missing anything? Any imput you could provide will be greatly appreciated!

Thanks!

 

loose/damaged vacuum hoses.

 

It sounds like your transmission shifts back to lower gear atcertain speed and go back to normal again frequently.
You should check your transmission oil level first.