Zach McAfee

The air compressor has enough airflow to hold them open even if there is a leak. I would be carefull because who knows how much pressure the diaphragms in the actuators can take. A pump is better because you can keep the pressure low and monitor how much pressure is required.

If you can't get your hands on a pump, use the air compressor initially and then hold the line closed with your hand to make sure it holds the air. With the hand pump I could keep the actuators open, but as soon as I stopped pumping they would slowly slide back into place.

I don't know what your exhaust setup is, but I'm pretty sure you have enough backpressure with a street setup. Again, if you had a pressure gauge, you could measure exactly how much backpressure you have by hooking it up to the 6port feed line and running the motor up in RPMs.

I highly recommend running to the parts store and buying a nice vacuum/pressure pump with a guage on it. These are also nice for bleeding the brakes by yourself.

hugues

Another way to check for a clogged exhaust (symptom: low power at high rpm, hard to start) is to:

connect a vacuum gauge to intake manifold

rev the engine to about 2,000-3,000

release throttle

manifold vacuum should rise for a short moment and then go back to normal quickly. If it is slow to react, there's an obstruction in the exhaust.

hugues -

Net Seven

iTrader: (5)

Well are they supposed to slowly go down after i stop putting pressure into the hose?

Zach McAfee

No, that is exactly the problem. There is a leak. They should pull down and stay down.
Chances are you didn't remove all of the gasket material. Take off the actuators and completely clean everything and reinstall using gasket sealer just in case.

Net Seven

iTrader: (5)

So its fine to use that silicone gasket stuff on the aux ports? I guess I can do that... also how do i check to see if the actuall aux are good or not? I got extra ones laying around so I can put those on.

luv'n my 7

Are the actuators working if you get the 3800 rpm hesitation?
I have a streetported moter, nosats, no airpump and a header running thro 2 straight piepes which i think are 2 1/2 in diameter so are mine working?
I haven't reved past 5000 yet so im not sure. If their not what do i have to do to get them working again? Put on a new airpump?

Net Seven

iTrader: (5)

I just checked my aux ports by placing my thumb over the opening and it stays down so, its holding compression... Then I tried to blow into the hose and I couldnt get the ports down at all. Too hard to blow into. What do you guys think??? I know the problem is the ports not opening at 3800rpms because the grease donesnt get smeared.

Zach McAfee

Ok, since there are no leaks you need to verify your exhaust is creating enough backpressure. You need a pressure gauge to do this.
Your lungs will barely produce 1psi, which isn't enough. This only works on S5 actuators.
I think you'd be interested in this.
https://www.rx7club.com/forum/showth...hreadid=147853
As far as the stock system, there isn't much too it, so if you troubleshoot it from where the air goes in to where the valves move, you will find the problem. I screwed around with mine for 2 months before I figured it out. I was swappin **** out and not getting anywhere. When I started testing each part of the system I found my problem. Your problem, I don't know until you test every section. You do need a pressure gauge at this point to save any more hair pulling.

Buy me a plane ticket and I'll take a look at it.

Zach McAfee

The 3800 hesitation is another beast. Add a few more ground straps. You probably broke a few when you replaced the motor.
I'm assuming you have a S4. That exhaust system may not produce enough backpressure. The airpump has nothing to do with it unless you have a S5, in which you need the air pump but the system is almost flawless in that it does not depend on backpressure.
Read through this post if yours are not working.

Net Seven

iTrader: (5)

Ok, I need to know exactly how this system works. So far all i know is that backpressure from the exhuast line blows pressure into that hose and the aux ports go down. Is there any other vacume lines or anything like that, that could be leaking? When I said it wasnt leaking and was holding pressure I ment that I took the aux ports off the car and tested them not the stuff on the car.

MrFuzzy

iTrader: (1)

If the Cat is clogged would it affect smog testing?

Net Seven

iTrader: (5)

Ok i have now just tested it while it was all attached with an air compressor. I put 10psi into the line and the ports slowly went down, then when the pressure stops they go up really fast. I even tried to kink the hose while they were down to see if the pressure went back into the the air compressor or something, and same exact thing they just go back up really fast.

So right now i know that I need a lot more psi to get them down then they are supposed to be getting, and they dont stay down at all. An air leak somewhere you think?? Its not the aux ports, i just tried swaping them and stuff like that, and same exact thing... I also have new gaskets on them, and yes i did take off the old gasket very well.

Some please help, my car seems like a slow POS.

Net Seven

iTrader: (5)

I am thinking maybe I should take the intake manifold off and everything like that and clean the ports, and replace all the hoses. I think that I have a leak somewhere in the hoses causing my ports not to work. How much hose of what size will I need and what gaskets and other things would I need to do this job?

Zach McAfee

Ok so you do have a leak. Try spraying windex everywhere and then put air to it. It will bubble up where your leak is. I don't think you need to remove your whole intake.