I have a 92 rs with a 305. I went to change my egr valve the other day and it was abit cold. I had to move what I think was a vacuum from the bottom of the throttle body on the far back, right above the intake, and it busted. I was wondering if any1 knew where it went and if it was important. Its just a little plastic line

 

The one on the bottom connects to the EGR and vapor recovery system depending on the year model, but EGR definitely.

 

ok....is it safe to run with out or is it a must fix part

 

safety isnt really the issue, if your egr is unhooked you arent going to recirculate you unused as fumes, it may cause the car to run poorly if it creates vacuum that is necessary for the engine to run perfectly, im guessing it will cause a vacuum leak because you usually need a egr block off if you delete it

 

well then i guess i have to put it back on....so does it run back into the bottom of the throttle body or to some where else

 

i really cant answer that im not fuel injected so mines a tad bit different, id like to help but i think someone else is better suited to answer that for you..sorry

 

well it would be nice if some1 could give me a straight answer

 

If it went anywhere else it will have a Tee at the bottom of the TB, or somewhere down the line.
EGR is activated during part throttle, if EGR doesn't work due to no vacuum it may, or may not set a DTC, but it will run a bit warmer because EGR reduces Nox by reducing cylinder temp.
no problem if vapor recovery doesn't work and neither system affects engine performance they're just emissions systems.

 

i thought the vacuum leaking would create engine issues

 

Ok so where does the little line off the back of the throttle body go? its a very small plastic line. i pulled it out after it broke up near the throttle body and when i pulled it out, it came out easy and the other end looked like it had been cut clean and even



EDIT- Would it be the vacuum lime to my map sensor?