ok so i found out my egr solenoid was the thing blowing my ecm sol fuse so i bought a used solenoid and put it on today. the fuse didnt blow but the car idles rough and after a few minutes the check engine light comes on. if i unplug the vacum line to the egr itself the idle smooths out and the check engine light goes off. i did notice the whole time the engines running there is vacum to the egr. is this suppose to go off after a while? also the egr is getting hot with a little smoke and it never did that before. cars all stock except for a hypertech chip i put in it back in 87. any help would be great thanks,jeff