i have a 91 civic dpfi auto and its real sluggish off the line and pops a code 12. i checked for manifold vacuum thats fine. idk what the silver sensor is i think the lift solenoid behind the black box. i get vacuum all the way up to the sensor but get no vacuum out there fore no vacuum to the egr when i rev it. does anybody have any opinions? when i lift the egr manually the car stumbles and almost dies