Heres the thing. I was wondering about my egr so i was messing around with it and i unplugged the vacum line and the car didnt stumble or anything, and thats what is weird , my car is already throwing a ses code for my IAC and idling at about 1100. now i always thought that unpluging the vacume lines would cause a stumble.so i pulled a vacuum line off the plentum and again nothing happened. I am thinking i have a leak already , any ideas/help please.

 

spray the vacuum lines with wd40 with engine idaling, the rpms will drop when you find the leek. Do Not Spray The Exaust.

 

does anybody know where i can find a vacum line diagram for a 1997 lt1?