locketine

I'm pretty sure it was originally hooked up to the airpump, which the FSM says is hooked up to something else. I believe it is called the check valve and the FSM says it hooks up to the rear of the intake manifold, where, I have no idea.

oh yeah, I have a 88SE

casio

thats going to hook up to the OUT of your ACV. should be on the mid or lower intake manifold facing the passenger side.
i havent dealt with the ACV much (or at all) since mine is gone, but its between the smog pump and air pipe (which your hose is currently connected to).

Kingofl337

looks like the 6-port actuator house to me.

scathcart

The 6 port actuator hose is a 3.5mm pipe attached far lower down the split air pipe which is shown in the picture. The orange pipe attached to the check valve in the picture attaches to a 1" nipple on the lower intake manifold, nearest to the firewall. That nipple is fed air pump air via the ACV under certain, specific operating conditions.

It is definitely not the hose for the 6-port actuation, although the hose for the 6 pump acuation is attached to that split air hard pipe.

locketine

I only see two valves on the ACV, one of which connects to the airpump and the other is currently connected to the air baffle I believe that's in the front of the car.

The Spyder

iTrader: (8)

Look closer behind the block, it was setup like that to pass emissions. The red hose is running directly from the air pump to the cat. split air pipe.

casio

damn. HAILERS would likely be able to explain this well.
i admit, i should have said "i believe" in front of that; i apologise.
when i had mine hooked up, it was air pump straight to the split air pipe since i have no ACV. HAILERS was telling me how important he feels the ACV is. unfortunately, i have never dealt with it.

casio

i can't tell what you're saying here. are you telling him that the red hose is, itself, attached to the cat? or you saying its supposed to go stright from the air pump to the cat? are you saying the red hose should be going from the air pump to the split air pipe? i cant tell.

anyways, the air from the air pump to the cat is NOT direct. that would imply the air pump is constantly feeding the cat air which isnt true. also, this will not work. the split air pipe and the air pump are different diameters. if it were direct, they'd be the same so a single hose could be used which is not the case.

i cant tell if thats what you're saying, but i wanted to make that clear for the poster. i read your post more than once and stil couldn't decipher it.

The Spyder

iTrader: (8)

It was my car and I did that.

The split air pipe (circled in green) goes to the loose black hose I believe I left hanging right behind the block. After you reconnect it properly, completly remove the red hose. Re connect the air pump into the ACV (the open nipple on the right hand side of it).

HAILERS

It's too dark for hailers to see just what hose is being talked about. Maybe put the light at another angle so we can see the hose better????????

casio

heh, makes more sense. i did that as well. it doesnt work the same apparently. HAILERS strongly believes its necessary for the air to pass through the block and out the exhaust (via the small holes in the exhaust sleeve). i never completely understood this.

casio

the hose that's circled is directly attached to the split air pipe. he's wondering where it comes from prior from the split air pipe.

7th Heaven

scrap that ****, don't need it!

locketine

I thought about just pming ya spyder but I figured someone would just take a picture and I'd be done with it. I'll go looking for that loose hose tomorow when it's warmer and lighter.

I know i need the acv for the 5/6 ports, but do I need the airpump?

HAILERS

Got me. My belief is...............the catalytic converter is most effiecient when the mixture in the exaust fumes, is at approx 14.7.

If one has a wideband, he will see that if he disables the ACV and the airpump air gets dumped overboard instead of being sent to the normal route to the exaust ports, that the AFR shown on the wideband will be in the high 12AFR to low 13AFR.

If he re-enables the ACV and the airpump, he will see a figure close to 14.7AFR.

You don't need a wideband to see this trait. Just a meter connected to the O2 sensors output will show the same results. Usually I used to see 0.1v(Lean) using a meter on the 02 when the airpump/acv was intact and working. If I just pulled the Blue connector off the Relief Solenoid which disables the acv and dumps the air overboard.....then the 02 sensor would read in the 0.7v or so range i.e. rich.

I read this theory/idea, somewhere, sometime, once upon a time.

And while I'm here.......if this car is a series four, the auxillary ports are operated from exaust pressure from the catalytic converter. The air pump has squat to do with the actuation. If you think that the airpump activates the aux ports, remember or know this............at 3800 rpm the Relief Solenoid disables the Relief valve inside the acv and dumps the airpump air overboard into the silencer in the right fender. Only a amemic amount of air goes to the Split Air Pipe while driving. Now take into consideration that the aux ports open at approx five grand. See what I mean? It's the exaust pressure From the Catalytic Converter/exaust that opens a SERIES FOUR. That is NOT the case for SERIES Five cars. Their aux ports are driven from air from the airpump. There is a pickoff line from the airpump discharge line that goes first to a solenoid then to the aux ports to open them. The solenoid is scheduled from the ECU by putting a ground/not putting a ground on that solenoid. It depends on load and rpm to schedule the opening/closiing of the solenoid.

In the picture I couldn't tell if the red hose was a aftermarket water hose routed different than stock (for the heater) or something else.

JUST IN CASE: I don't doubt folk can pass emissions by feeding the airpump air to the catalytic converter. No doubt at all. I don't think it would work as a permanent installation though. I'm guessing the cat would go **** up after a few months. Just guessing.

HAILERS

Think about this......the 02 sensor is b/t the exaust ports and the catalytic converter. You have the air going to the catalytic converter itself. The 02 sensor is seeing a mixture at 13afr while you are on the emissions test bed and the car is at 1500 to 2100rpm. The 02 sensor is IN THE LOOP. Heck. You'all must be right to some degree. The ECU must be trying its *** off to make the engine run leaner. Or am I confused again??????????

I think I'll continue to just connect everything up per FSM once a year to pass emissions. It works for me each and everytime. Welllllll....three times a year. Three cars.

casio

i just don't see why this (14.7 AFR) would affect the cat. i'd have to look in my book to see if it mentions this. from what i know, though, the first section ("honeycomb") inside the cat is merely oxidation reduction, which, as you know, strips the oxygen from the mixture. the second, fed air via the split air pipe, re-feeds the mixture oxygen giving off a more pleasant mixture (ie co2, h2o; low or no co, nox). i can't think of a reason why the mixture would matter if all the first section of the cat does is strip the oxygen. the answer could be plain as day, i just don't know it.
as for the o2 sensor reading rich and lean, that's weird to me altogether. mainly because it seems as though the acv routing air in a way that affects the o2 sensor's reading (making it act as though the car is lean) would be a bad thing. i can't really elaborate from there because i'm flat out confused by this.

this is exactly what confused me. i would think that, with the o2 sensor genuinely reading rich, the ecu would trying a bit to lean itself out. at the same time, i don't know how intelligent our ecus are or what they look at. my point is that; with the o2 sensor reading rich (not being fulled to think the exhaust is leaner), i would think that would tell the ecu to lean it out some. maybe the ecu just doesn't care and simply uses the o2 sensor for open and closed loop??! i haven't the slightest.