so the smog pump sucks right ? so say if you were to take off the piece of pipe that clamps onto your smog tubes , would your exhaust manifold suck air into the esxhaust stream , since all exhaust gasses are flowing AWAY from the hole were the the piece of pipe clamps onto your A.I.R tubes thus creating some sort of vaccum , or is this not possible?

 

Some GM cars had an A.I.R. system without a pump. Like my '80 Citation V6.

I doubt it would work with a stock V8 system, though. You'd need check valves, plenums, etc., for it to work properly.

To say nothing about the fact that the A.I.R. pump on our cars is there primarily to inject air into the cat.

 

ok , what i meant to say was that , say you were to run your engine without the piece of tubing that connects your drivers side AIR injection tubes to your passengers , would exhaust gases come out from the hole where the tubing connects to the air tubes or would it suck in air i.e. since the exhaust flow is moving away from the engine and the AIR tubes , would it create vaccum and suck in air or would it blow out exhaust gasses through the air tubes ?

 

with a properly working factory exhaust and under light steady throttle the AIR
injection tubes going to the manifolds do pull a little vacuum thru the check
valves. some will even pull a little vacuum at idle.
the systems like five7kid mentions on the Citation was designed to draw air
without the need for the AIR injection pump. they only moved about 1/4 the amount of air the systems with a pump move.
IIRC, that system was called Pulse AIR.
they were very noisy if you left the hose from the AIR plenum to the air filter housing off.
if a check valve in the AIR plenum went bad, it caused all kinds of run problems.
i was glad to see them go away.

 

yeah ..... because some @#*hole removed the tubing that ran from the passengers manifold to the drivers and replaced it with some goodyear hose , could this be a culprit for driveability problems ? what can this cause ?

 

The tubing doesn't have to be anything special.

The worst effect of not having flow to the manifolds is it tends to burn out the check valves.

There shouldn't be any driveability issues with not having A.I.R. pump operating as it is supposed to be. As I stated earlier, the majority of the time the flow is directed to the cat, beyond any engine sensors. During open loop, it is sent to the manifolds, but since you're at open loop, it isn't going to cause feedback problems. There are conditions that the ECM sends air to the manifolds during closed loop, but that is for emissions reductions, and again doesn't have a major effect on driveability.

Many, many members have removed the system (illegally, of course) while retaining the feedback control system without issues.

 

so im in the clear then , still though im having driveability problems"rich" at least i know that would not cause it to do that , thanks five7kid for the info

 

as five7kid said, what the hose is made from doesn't really matter.
from the factory GM used hi temp rubber hoses from the control valves to the
check valves. the hose gets old and will crack. most people will just use a good quality heater hose as a replacement.
orange goodyear heater hose is what i prefer to use.


there is one problem you can have with the AIR injection system that can cause driveablity problems. that is injecting air to the manifolds at the wrong time.
if the ECM thinks the air is going to the cat or atmosphere, but is instead going to the manifolds, it will think the motor is running lean and will add fuel.
normally this problem is caused by a bad control valve.
but it could also be caused if someone has wired the plugs to the control valve wrong.

 

the control valve is the square box with two circles on the side right? and two connectors plugg into it , and it close tho the heater control valve and AC compressor?