DTC P2004 Intake Runner Stuck Open

We had our car at the dealership because the pzev engines have a defect warranty, anyway they installed a new pcm an up dated one, they checked circuits and now they are saying the wiring is not covered so it still has the same problem. Ford said the plug connector that goes to the actuator for the IMRC the black blue wire that is one of the three wires suppose to have five volts only has three volts and I knew that because I tested it. They said it was a possible open circuit and they wanted $250.00 for an electrical diagnostic and I do not have the money. All the work they did was under the defects warranty, but that still did not fix it. Does any one know where I should go from here? This Focus still does not have current tags on it.