Today, I took off the cat, precat, resonator and air pump off my car. It sounds beautiful but it won't idle anymore. I am guessing there's a huge vacuum leak. There's a line that goes straight into the cat, is that supposed to be blocked off?

 

yes i think, if i remember..

 

oh ok, someone told me to block off the ACV. I am guessing that hose (one that goes to the cat) is the ACV. Let me know if i am right.

 

yes you are... I haven't experienced this problem before, but i'm pretty sure your right man.

Max

 

wait what. You removed your air pump, so on your lower intake manifold theres a thing. Thing is the best i can describe it. It needs removed and a plate put over that. Well at least on FI its like that. Specs on ur car?

 

84 gsl with a 12a

 

then i dont relaly kno. on my 84 -se the ACV was a thing on the lower intake manifold that was connected to the air pump and it needed to be removed and a plate put on

 

Yep, same thing for the 12a, remove it and block it off.

 

ok, thanks!