Hello, my 85 22re 4Runner has developed an annoying problem. Whenever the truck is warm the idle gets rough and when I turn the headlights on the idle surges from like 200 to 800 rpm and is really rough.
Also the voltmeter varies with each blink of the blinker.
What I have done so far:
New battery
Alt tested - advance auto said its good
New vacuum lines

Here's a vid. Please help
http://youtu.be/KS6TFXgeEkM