s5 5/6 port activation
 

I have a good understanding of how the 6 ports work but isn't there a way to trick them into opening when the car is not moving by pulling a sensor? I remember reading a thread (which I cannot find) that someone suggested removing a sensor. I don't remember it very well but I think it had something to do with a MAP sensor. I am not even sure what MAP stands for. Thanks if you can provide any help.

~George

i know i cant help ya there but il bump ya up to the top again!!

Ok, I know that the air pump goes to a solenoid valve that opens so the air can go to the actuator that opens the auxillary port valve. I belive that the solenoid valve (6PI) is electric, so what triggers the 12v charge that tells the valve to open and close?

Come on guys help me out, I know there has to be a way to get these ports to open when I am under the hood. One of you RX veterans around here most likely knows how to do this.

i know you can wire them open on the s4 but i'm not sure about s5 i acutally just installed and eceltric solinoid valve to turn mine on and off

I don't want them to be open all of the time or to have to manually control them. I am just trying to figure a way to make my stock electric solenoid valve tell my ports to open & close when I am under the hood watching it. My actuators are free moving when I open them by hand but I don't always feel the ports opening when I am driving.

the electric signal is sent directly from the ecu I imagine. It would probably be difficult to make it send the signal but I imagain you could just briefly connect a different power source to the solenoid to make it open then close. It's not exactly a good idea but I don't think the ECU will open them without the car being under load.
Patrick

They are operated by air. On the s4 they are opened by exaust backpressure. On the s5 they are opened by the airpump. Nothing electrical to do.

the air to open them may be supplied as in said explanation, but there are solenoids that route the air to the ports at a set rpm. the ecu does this. 12v runs to a solenoid, and when it needs to route air to the ports to open, the ecu grounds the other contact on the solenoid so that the 12v will click it open. the ecu will not signal the solenoids to open the ports unless the car is under load and hence they will not open while revving in idle. if the ecu signal is not working properly the only remedy i know for this is to run an rpm switch to control the solenoid actuation.

Not exactly... the air from the air pump sends air to a solenoid valve that gets a 12v charge to open & close. The soleoid valve (6PI) is between the air pump and the actuator that controls the auxillary port valves.

Or you could put 3-4 psi to the air line that feeds the ports...

Bingoboy... Since I don't have a split air pipe going to my exhaust from my air control valve (it blows into the atmosphere) could I have too low of pressure in the line between the air pump, soleoid valve, and air control valve to open my auxillary ports?

i dont have the split air pipe either, and the ports and vdi all work fine. same with 2 friends with s5 NA's. so you are sure that your ports arent opening? if not you can try a few things to figure out the problem.

first would be taking a handpump like for a basketball and using it to blow into the tubes on your actuators and see if the ports open. maybe use some penetrating oil on them to get them freed up if they stick. if they stick bad enough that you can't open them like that then you will probably have to pull the manifold to clean them further. it can get kind of gunked up in there.

you can also try giving your solenoid 12v/ground and it should have a noticable click when it opens up. make sure you can blow through it and its not clogged. you can also try pulling off the hose running to it from the airpump and see if its blowing air.

if everything checks out then it's probably a signal problem. my friend's turned out to be a signal problem so he threw an rpm switch relay at it and hooked it up to his msd box for an rpm signal. his ports now open even in neutral rev. if you want to be absolutely sure its the signal or signal wire to the solenoid you can make a piece of wire to lengthen it and go driving around with a friend holding a mulitmeter to test it.

That was my suggestion, but you're only pulling a hose off a sensor, not removing the sensor itself. I don't have an S5 NA, so it was only a theoretical suggestion that should work. But I don't know, which is why I asked for someone to go out and test it. But nobody did, so here's your chance to educate the FC community. ;)

MAP stands for manifold absolute pressure. The MAP sensor is used to tell the ECU when the engine's under load. The auxiliary ports are only opened under load, so if you pull the hose off the MAP sensor the ECU will think the engine's under full load even when it's not. Hence it should open the aux ports when the engine is revved high enough. Try to make a note of the exact revs they open, so you can educate us further.

Now go try it...

if you just want them open why not pull of the intake manifold and remove the sleeves? if you want em left in its a good chance to clean those suckers out. On the two 6 ports i've torn down, both were around 120k miles...and both had the sleeves completely stuck closed, no chance that they were opening before, i couldn't believe it....so get em cleaned up

wired open is majorly sucky for city driving.

Where is the MAP sensor at?
 

Alright I can try that out, but where is the MAP sensor located at?

NZConvertible, would that be the pressure sensor that you are referring to? If so, the pressure sensor is stuck onto the front of passenger side strut tower and has a vac line runnin to it.

I pulled the hose off the pressure sensor that is stuck onto the front of passenger side strut tower (I think it said N350 on it) and nothing happened. I hope NZConvertible is talking about anouther one.

the function of a pressure sensor is "Detects intake manifold pressure sends signal to control unit"

friend got that out of the fsm. i think the pressure sensor is a map sensor. doh.

Yes, the full name for what Mazda simply calls the pressure sensor is manifold absolute pressure (MAP) sensor. ;)

Geoman, so you pulled the hose off the sensor and revved the engine up past ~4000rpm, and the auxiliary ports didn't open?

correct

Damn, I was 99% sure that would work...

Do this instead then. Unplug the solenoid with the brown plug and connect 12V and ground to its terminals. With the ignition on this will open the solenoid. Then rev the engine up and if all is well the ports will open. Repeat for the VDI (white plug).

Just a little help. The MAP sensor is that Pressure Sensor located on/near the right strut tower. Black in color. Rectangular in shape. One electrical plug on the bottom. One vacuum nipple on the bottom.

Remove the vac hose and plug it with a screw/bolt. Leave the electrical plug on.

Start the engine. Stand near the engine and rev the engine. Watch the auxillary ports to see if they actuate.

DO IT NOW, NOT LATER.

P.S. the six port solenoid has 12v going to it anytime the ignition sw is on and the engine is running. The ECU puts a GROUND on that solenoid to actuate it. You disconnected the pressure sensor to try to simulate a Load. It might work.

IF it does not work as described in NZ's theory......try this and it's guaranteed to work. Pull the plug off the six port solenoid. Apply 12v to one pin of the solenoid then a ground to the other pin on the solenoid. The solenoid WILL click and if the engine is running pass air from the airpump to the auxillary ports and they WILL move.

Sorry, I don't own a series five and doubt I've been within five yards of one .....ever. The above WILL work though. IF the airpumo is a pumpin and the voltage and ground are applied to the six port solenoid. It's written. Now go out to the car and hit a homer (no steroids required in this game). baseball humor

Hailers is right, according to the FSM the air pump should generate more presure at idle than the 6PI actuators need to open the ports. So if you electrically operate the solenoid with the engine idling they should pop right open. :)