2.8/3.1 air pump?

[Mr_Efficiency]

when i was at the wreckers last weekend pulling my tranny for my swap I noticed the 2.8 in the car had an extra pump of somekind on the rear of the motor. it wasnt alt, p/s, a/c or water pump. it was just below the alternator on the back of the block.

The car has AQ9's (pnematic(sp?) seats) in it like mine has, i was wondering if this was some kind of air pump for the seats or something. I havent looked yet to see if my car has it as well.
thanks.

[3100 MPFI]

nope. The seats airpump is located under the drivers seat.

That was probably the A.I.R. pump for the EMISSIONS stuff. At least, that is what it was if it was a MANUAL TRANNY car.

[Mr_Efficiency]

ah ok, yeah my car dosent have this pump and the car i saw the pump on was a 5 speed.

So whats the purpose of this pump, what does it do for emmisions and why only on 5 speed cars.

[3100 MPFI]

not 100% sure. I used to have a 5-speed cutlass supreme, but the air pump was out on it. I THINK that what it does is when the car is cold, it pumps fresh air into the exhaust to make it not be so rich coming out of the tailpipe. I am probably wrong, or there is more too it than that, but that is what I have been told.

[geoffinbc]

Yup that what it does. Helps the cat light up too. It only pumps air into the exhaust while the car is in open loop.

[Mr_Efficiency]

someone should hook that up so it pumps into the intake like a mini supercharger, lmao

so its not important really? not worth the hassle to swap in when i do my 5 speed swap?

[3100 MPFI]

Back when I had a 5-speed Cutlass Supreme, the AIR pump fried, and the dealer just said that when the car was cold, it would run a little rich. Once it warmed up, it was fine.

[Mr_Efficiency]

K thanks, so no worries. I plan to run turbo anyways wouldnt that have a similar effect, i dont know how true it is but i keep hearing a turbo is good for emmissions.