The solenoids are what I referred to as controls. Yes, they do go bad among other things. I think your shop's problem is that they don't know how to diagnose it so they're quoting outragous prices to scare you off.
P1516 >Inlet Manifold Runner Control Input Error (Bank 1) (Ford)
>>P1517 >Inlet Manifold Runner Control Input Error (Bank 2) (Ford)
>>P1518 >Inlet Manifold Runner Control Stuck Open (Ford)
P1519 >Inlet Manifold Runner Control Stuck Closed (Ford)
>>P1520 >Intake Manifold Runner Control (IMRC) circuit malfunction >>
Edited by Hammer Time on August 17 2005 at 9:35 PM