Did a search and didnt find enough info.. just wondering what all I need to do this. Also if it has any effects on performance whether it be power or milage.

 

It won't give you any increase in performance other than a few pounds off the front end of the car. !EGR may have a small negative effect on gas milage. Removing the AIR system does clean up underhood and makes working on things a bit easier. To remove it on your '94 you just have to remove the pump, plumbing, and plug the AIR bungs on your manifolds/headers and the AIR port on your induction. As long as you have a good fuse in the fuse box your PCM won't complain. Removing EGR puts you at risk of throwing a code and is a bit more work to remove and plug all the necessary ports, I wouldn't do it unless you are having problems with clogged EGR valves.

 

I wanted to get rid of the egr because it sems like it has more clutter than the air pump but I need the milage for now so it stays... what do you use to plug the hole on the manifold part I know where your talking about I just dont know whta to use.

 

If you think the EGR has more clutter than the AIR pump...

Where'd my AIR pump go?

 

EGR more clutter than the AIR system The EGR system has one tube, one valve, one small solenoid, and some small wires and vacuum tubes. The big stuff (if you can call it that) is behind the manifold and can barely be seen.

The AIR fittings on the manifolds are the threaded type. You can use drain plugs or even cut some bolts to fit if you need to.

 

Guess not... you know what works best toplug up the hole?

 

I may be wrong but I have a feeling you are confusing the AIR system with the EGR system.

The AIR system has two fittings on the manifolds, one on each side. There is a check valve screwed into each hole. There is also a tube that goes to the air intake, up by the driver's side headlight that routes fresh air to the AIR pump.

 

I know what the air system is I know there is a hose going from the drivers side of the ram air box to the air pump and then there is another hose going to some metal tube traveling down and under teh engine in front of the oil pan and around the other side of the engine somewhere the metal tube originates from something coming off the exhaust manifold towards the front. is this all teh air system? Whats the egr then??

 

The EGR consists of this rippled tube that goes back to the passenger side exhaust manifold, and the EGR solenoid. The solenoid is the round black object on the back of the manifold on the far left of that picture, with the vacuum lines. Pay no attention to the Schrader valve or fuel pressure regulator.

 

The AIR system draws air from the ram air box and pushes the air to the two check valves (one on top of each exhaust manifold). The drivers side simply has some hose fromm the pump to the check valve. There is a metal tube that routes the air to the passenger side, it is routed around the timing cover and comes up on the passenger side behind the alternator where a rubber hose attaches it to that side's check valve.

The EGR system also taps into the manifold, passenger side, far back, just above the Y-pipe. That tube goes to the rear of the intake manifold. You can feel this tube if you stick your hand behind the intake manifold on the passenger side. It is a flex pipe (corrugated) while the AIR tubing is smooth.

 

OOOHHH so those things sticking strait up off the front of the exhaust manifolds are part of the air system? Well once its off teh manifold what do I use to plug it up, its got to have some heat resistance?

 

You got it

Most people simply screw some drain plugs in there. Since GM has used two different sized threads I would remove one of the check valves and bring it to your local parts/hardware store to match up. The only thing special I do is apply some high-temp anti-sieze to the threads before torquing them in.

 

M22 drain plugs fit mine with no problem, except that the 22mm plug is very rare, and was used on some late 80s Ferraris.

 

And the check valve is the thing sticking out of the manifold I assume... It looks like a hex nut so I just find a bolt that fits and use a hex nut of the same size with a closed end... that a sensible way of going about this? and are they both 22mm?

 

Yep, those big ugly black things are the check valves. They allow the air to flow into the exhaust when the airpump is engaged and prevent exhaust from going out when the airpump isn't running.

It's easier than you think. The check valves use a threaded male end and the manifold is a female thread. Mine were stuck in there real good with low milage and the hex fittings on the check valves are really large... I think I had to go to the local hardware store to find a wrench big enough. If you don't have the tool, let me know (email) and I can double check on the size of wrench.