Well I took my car for the first drive since I got it and the boost goes 5-6 ish then it drops to 3 then back up. Niw I know about the seq. 10-8-10 but I dont even get 8psi. the car has no boost cont. on it so the lines are stock I dont know where to start can someone please help me?

 

Look for a boost leak.

 

what a mess, I did a little and it runs like it is one (1200-900-1200-900rpm) but then it goes away, like a valve is tryn to close but doesnt all the way, then 900rpm like its all good,? what solenoid might that be, like a first one to look at there is soo many of them.....

 

No solenoids yet. Just a leak on the intake piping. Start at the y-pipe, inspect both couplers on the crossover pipe. Then inspect the piping coming off the intercooler.

There is a link for "boost leak" in the FAQ, and numerous more if you search.

 

thanks man, let you know

 

never found the leak yet but when I drive the car past 5000rpm the car sputters real bad think its related?

 

Have you taken a look at the troubleshooting guide from the FAQ thread?

http://www.autosportracetech.com/RX-...leshooting.htm

 

thanks!! just what I was looking for. Ill check today and let yous know tonight, thanks!!

 

Sputtering? Maybe your over boosting and hitting fuel cut. Could also be plugs wires, coil harness or the coil itself.

 

I changed the brake booster hose, is there a check valve it the stock one?

 

I ran a boost test today and I do have boost leaks, lots! I think that it sputters because there is too much fuel when the 2nd turbo kicks in and runs mad rich, true?

 

Find a shop with a leak tamer and hook the car up to it. It is a fast and easy way to find leaks.

 

wow I have no luck, I broke both the charge, wastgate, and turbo pre controle valves last night. they are so old and brittle. I went to the dealer and it was $280 plus tax (13%) so I got valves from the wreckers today so I hope they work. do I need them or can I use boost contrloers? I seen the diagram "damian boost controle setup"

 

I would consider calling Ray at Malloy Mazda. Not sure if they will ship parts to Canada or not, but I'm guess his prices are going to be a lot cheaper than a local dealer. 888-533-3400 Ask for Parts, then ask for Ray. If he isn't in, call back when he is.

 

Yes, the brake booster line has a check valve.

Your dealer will kill you on the price of solenoids. You could consider the damian setup, except that you should probably cap off the other end of the precontrol and wastegate actuators. This way you can skip replacing the wg and pc solenoids.

The charge control solenoid is still important. You could get a new one from Malloy, your local dealer, or a used one from the classifieds.

Dave

 

I ran into a similar issue on my new purchase as well. The previous owner did a vacuum hose replacement, but reversed a check valve from the Y-pipe to the pressure chamber. This was basically affecting the Turbo Control actuator, which was causing ****-poor boost pattern.

Took out the check-valve, tested, and placed it in the right direction. Now I get 10-8-10...

 

I finished replacing all the lines I could, 90% of them. After I put it all back together it started no problem at first, first drive was good, hit it and it was at 10-8-10. after driving it around it seems to drop a little like 9-8-9 or 8-7-8. I hope I dont have to do it again, is there a gaskit on the intake pipe b4 the th.body there was non on it when I took it off so I never looked into it. I still want to do a boost test again.

 

There is no gasket between the intake pipe the the throttle body. There is however a gasket between the TB and Extension Manifold. You can see it clearly on the services manual section F-Index breakout.

Nothing to worry about there.

 

ya its metel so I can re-use it right?

 

Yep

 

Man, what a car. ok now this is a new one now, my car was running mint b4 this started. I was driving around and was pissin around and one time when I pinned it, it seemed to have no boost. So I kept driving and it was fine so I forgot about it. ten min. later same thing. So I started to listen and I cant here the turbo spool up some times. no air hissing out just no spooling and I watch my vac. and boost gauge and it pulls same vac. but longer for boost like secondary turbo is doing all the work. wtf, please help!!!!!!!!!