View Full Version : idle air control motor question

05-02-2012, 08:15 AM
I'm curious to know how far the spring piston in the idle air control motor on my 87 Chevy silverado 305 TBI is supposed to move. When I took it out it wiggles a we bit in and out but maybe only a mm. Is it supposed to move freely by hand or do you need to apply power to it to test it? Like can you easily move it in and out a 1/2" by hand??