The check engine light on my 2003 Ford Ranger 4 cylinder came on about 2 months back. I took it to Auto Zone and had them check it with their computer and clear the light. The other day it came back on so I took it back to Auto Zone and got the same reading. The Code they are getting is.....Intake Manifold Runner Stuck Open Control Bank 1. The guys at Auto Zone had never heard of Manifold Runner, has anyone had this problem?

 

Manifold runner is the fuel line the injectors plug into. It may have an injector or vacuum valve problem.