Hello. I have a 2007 Nissan Xterra 4.0 L Engine. When the Intake solenoid is plugged in the engine chatters and idles rough. When I disconnect the plug the engine runs smooth. I had a code of P0081. I checked the wiring and the tests the FSM told me to do. I cut the white wire from the harness and ran an independent wire(Jumper) to the solenoid but when I touch the white wire on the solenoid it makes the engine run rough. Any ideas please?