He can check summit and buy sensor hole plugs. And your 95 Cavi was in the transition years for OBDII so that may be why it has two.

 

Ok, sorry it took so long, yes it's for the 88. I have an O2 sensor on my manifold. I also have a place for a sensor before my cat under my car. It's not a hole in the pipe so it's not been replaced like you suggested. I have something that looks like an L that isn't connected to my pipe, that holds a sensor. I've only looked at it once so I can't be more descriptive. My car smells like it runs really rich.

 

an L huh? well is it ON the cat? That could be part of the emissions. I couldnt tell ya the name of it, but mine has this "L" shape and its on the cat itself.

 

Can you get a picture? That would greatly improve our ability to diagnose it....

 

I guess lol, it may have went to the cat, I'm not sure. Someone did something around my Y pipe so the cat may have been move/replaced. I can't get a pic right now, I don't have a camera with me and I don't feel like gettin on the ground again. I'm not that lazy lol, I'm paralyzed and it's not the easiest thing. When I get off work I'll ask my dad if he remembers or will look at it for me.

 

350rs may be right. There is a tube on the cat and it is suposed to get air from the air pump.

 

So is it doing anything? It's just getting some nice clean cool air.

 

Unless you've got an air pump, no. You said there's no hole there? Are you sure it's not a one way valve in there, or something of that nature? If that's the case, it probably doesn't make any difference. If, however, it does not have a valve, I would say you should probably seal the pipe, or replace it altogether.