Aux. Port vacuum
05-08-09, 08:42 PM
#1
Aux. Port vacuum
My cats had all collapsed so I gutted them. I'm not entirely sure if the problem with my aux ports was from the gutting or if it was a problem before but to ensure proper actuation I did the airpump mod as kevin landers laid out. Still a no go on the ports working... I figured maybe the actuators weren't sealed against the
Manifold right, so I removed them and applied rtv. But not before hooking up a length of hose and blowing into it. Sure enough the rear aux port actuator was hemeroraging air, but the front actuator which isn't/wasn't. Actually it wasn't allowing any air thru at all. So basically the problem is that the front actuator isn't getting air and I have no idea why.
Manifold right, so I removed them and applied rtv. But not before hooking up a length of hose and blowing into it. Sure enough the rear aux port actuator was hemeroraging air, but the front actuator which isn't/wasn't. Actually it wasn't allowing any air thru at all. So basically the problem is that the front actuator isn't getting air and I have no idea why.
05-08-09, 08:52 PM
#2
i play with my wankel
Join Date: Jul 2005
Location: North Manchester, Indiana
Posts: 1,630
Likes: 0
Received 0 Likes
on
0 Posts
ummm did u blow into it with your mouth or shoot 120psi into it?? im not sure but i dont think you should hook those up to an air comp unless u have a regulator on it. On my S4 they dont leak any air of any sort when they come on?? Does the front actuator move at all???
05-08-09, 09:26 PM
#3
Sorry for the vague first post, I made it while busy doing other things. Let me re-post here...
My cats collapsed so I gutted them.... I knew that when I did that it was likely there would not be enough back pressure to open my aux ports reliably if at all. I'm not even sure they worked before, but judging by what I'm dealing with now, I'm guessing no.
Realizing this, I decided to do the airpump activation mod as laid about by Kevin Landers. I know I assembled the system correctly, but I could not get the aux. ports to budge even a little. After some searching I figured it was possible that without full, new, soft gaskets the actuators might not be sealing properly against the manifold and developing leaks preventing the actuators from getting any air pressure.
I removed the actuators and scraped off some old gasket and used some red RTV to re-seal it. I of course let the sealant set some before I torqued anything down. But before I did this I connected some tubing and blew thru it. Sure enough the rear actuator was indeed leaking a great amount of air. Removing the actuator, I plugged the hole and blew again.. It didn't seem like the front actuator was leaking but i figured for good measure I'd re-seal it at well. When I took the front actuator off, I again blew thru the hose. The front actuator is not getting any air at all...like it's clogged or something?
Anyways, I re-assembled it all and blew thru the hose again. The rear actuator works flawlessly and I was working on getting it adjusted with the engine running to have it open and close appropriately. However, the front actuator just won't cooperate. I'm wondering how the front actuator is receiving no air from the supply line?
ROLFS, yes, I blew through the hose. 120psi could damage or more than likely ruin the port actuators. It only takes around 2psi to open the ports.
The mod is done by tapping into the supply hose coming off the back of the air-pump and routing it to a split air valve... This means it has one inlet and two outlets and the two outlets have their own air valves... you route another piece of hose from one of the outlet valves to the air supply line on the back of the LIM which supplies air to the aux ports so they'll open. You then adjust the supply and/or dump valve on this setup to get the ports to open when you want them to.
I'm just not sure why the front actuator isn't getting any air. The only thing I can possible think of is a system I don't understand... the ACV (Air Control Valve) that sits between the port actuators. While swapping motors recently I broke one of the plugs coming off the ACV and it's irreparable. I wonder if it controlled a valve inside the ACV that lets the front actuator get air to open the port or what?
Anyone?
My cats collapsed so I gutted them.... I knew that when I did that it was likely there would not be enough back pressure to open my aux ports reliably if at all. I'm not even sure they worked before, but judging by what I'm dealing with now, I'm guessing no.
Realizing this, I decided to do the airpump activation mod as laid about by Kevin Landers. I know I assembled the system correctly, but I could not get the aux. ports to budge even a little. After some searching I figured it was possible that without full, new, soft gaskets the actuators might not be sealing properly against the manifold and developing leaks preventing the actuators from getting any air pressure.
I removed the actuators and scraped off some old gasket and used some red RTV to re-seal it. I of course let the sealant set some before I torqued anything down. But before I did this I connected some tubing and blew thru it. Sure enough the rear actuator was indeed leaking a great amount of air. Removing the actuator, I plugged the hole and blew again.. It didn't seem like the front actuator was leaking but i figured for good measure I'd re-seal it at well. When I took the front actuator off, I again blew thru the hose. The front actuator is not getting any air at all...like it's clogged or something?
Anyways, I re-assembled it all and blew thru the hose again. The rear actuator works flawlessly and I was working on getting it adjusted with the engine running to have it open and close appropriately. However, the front actuator just won't cooperate. I'm wondering how the front actuator is receiving no air from the supply line?
ROLFS, yes, I blew through the hose. 120psi could damage or more than likely ruin the port actuators. It only takes around 2psi to open the ports.
The mod is done by tapping into the supply hose coming off the back of the air-pump and routing it to a split air valve... This means it has one inlet and two outlets and the two outlets have their own air valves... you route another piece of hose from one of the outlet valves to the air supply line on the back of the LIM which supplies air to the aux ports so they'll open. You then adjust the supply and/or dump valve on this setup to get the ports to open when you want them to.
I'm just not sure why the front actuator isn't getting any air. The only thing I can possible think of is a system I don't understand... the ACV (Air Control Valve) that sits between the port actuators. While swapping motors recently I broke one of the plugs coming off the ACV and it's irreparable. I wonder if it controlled a valve inside the ACV that lets the front actuator get air to open the port or what?
Anyone?
05-08-09, 11:29 PM
#4
HAILERS
Join Date: May 2001
Location: FORT WORTH, TEXAS,USA
Posts: 20,563
Likes: 0
Received 21 Likes
on
19 Posts
Because there is a metal pipe that runs from the rear actuator to the front actuator and I suppose one of the banjo bolts is leaking air pressure. That's why the front one does not work OR you have the air passage blocked off with RTV at the front actuator or something similar.
Read this thread: https://www.rx7club.com/showthread.p...ght=banjo+bolt
Read the last page where I attached a jpg of the PIPE and banjo bolts that might leak air PRESSURE (not vacuum related at all).
Read this thread: https://www.rx7club.com/showthread.p...ght=banjo+bolt
Read the last page where I attached a jpg of the PIPE and banjo bolts that might leak air PRESSURE (not vacuum related at all).
05-08-09, 11:33 PM
#5
Hailers, prior to pulling the front actuator off (after pulling the rear one off) I plugged the rear actuator's air passage off with my finger and blew into the hose again to see if the front actuator was also leaking. I heard no hissing and did not get any air moving, and the actuator did not budge at all. After removing the front actuator (now both actuators were off), I again plugged the rear actuator's passage with my finger and blew again. Nothing. I'm going to probably pull the front actuator off tomorrow morning and see if I can get a bit of wire or paper clip in the air passage for the front actuator to see about clearing any blockages... hopefully this is just a very simple issue. I've got one port actuator working flawlessly, I'm close!
05-08-09, 11:48 PM
#6
HAILERS
Join Date: May 2001
Location: FORT WORTH, TEXAS,USA
Posts: 20,563
Likes: 0
Received 21 Likes
on
19 Posts
Remove the front actuator and leave the rear in place. Blow thru the pipes *feed nipple* and see if air come out the hole that feeds the front actuator. If not, then remove the front banjo bolt for the front actuator and blow again.
Pipe is shown in the attached jpg. Maybe someone used a common bolt in lieu of a banjo bolt.
Pipe is shown in the attached jpg. Maybe someone used a common bolt in lieu of a banjo bolt.
Thread
Thread Starter
Forum
Replies
Last Post
Jeff20B
1st Generation Specific (1979-1985)
73
09-16-18 07:16 PM
