My 01 Screw 4.6L fluctuates between 700-1200 RPM every once in a while. It races up and down like a roller-coaster until I give it some gas. This seems to only happen once in a while, but it is still weird that it happens. Any advice would be helpfull.

 

Search IAC. (or tighten up the fluxor screw........ ).

 

Thanks F151... I'll read it out... and then see if it could use a little cleaning.