bamabubba

Hey yall. I just went up to North Carolina and back home this weekend to get an 89 TII. It has a great body but it needs a few bugs worked out ,but its mine and im loving it. First of all a few interior pieces are missing and some of the interior wiring is fugged up. Could anyone send me some pix of what the dash should look like with all the panels installed and what the dash lights should look like. Second, the exhaust gasket needs to be replaced so the car sounds like sheat right now...lol. I already have the gasket so ill tackle that next weekend. Ive never ridden in a TII so im not sure how the car should feel...as far as when it starts to boost and how long. My only other 7 was an 85 gsl. I believe that since the gasket is leaking the car is not getting all the benefits from the turbo. When i get on it it makes a loud whoooooosh sound while im on the gas. I know that the turbo should sound something like that but it sounds like all the turbos boost is escaping from the gasket. Also when im on the gas the boost gauge barely gets past the 0 at the bottom of the gauge. Is this probably because the engine is not getting all the turbos boost because of the gasket? What should the guage read at idle? Mine is all the way at the bottom past the 0. Im also wondering about the options on the exterior. Didnt all TIIs come with a rear spoiler? Mine doesnt have one.
Also, any info yall could give me on the turbo specifications...size, boost from the factory and its limits,etc. Could anyone tell me of a website that would tell me how everything on the TII works as far as the wastegate and turbo and what were the different models of the FC. Im not sure what everyone means when they say s4 and s5. And one last question guys. I know these came with a wastegate but I was wondering how to change this to a blow off valve. Sorry about all the questions guys but i just wanna make my car as nice as I can. Thanx for any help.
Jeremy

Aaron Cake

iTrader: (1)

Several of these questions can be answered in the stickies at the top of this forum. The archives also contains information about porting the wastegate, and many other helpful articles. In addition, the FAQ contains links to the factory service manuals, which have some fairly good descriptions of the dash assembly.

You seem to have some confusion between a wastegate and a BOV. They are two different things. Check out this article:

http://auto.howstuffworks.com/turbo.htm

88t2romad

to answer a couple questions..

1: your boost guage needle should be sitting at the bottom at idle.

2: s4=86-88 S5=89-91

Wastagate and blow off valve are 2 different things. a waste gate regulates the amount of exhaust that is routed through the turbo, thus regulating how much boost a car can run.

A Blow off valve simply releases the excess pressurized air that is on the intercoolerside of the throttle body after the TB plates are closed. A vacuum is created inside the intake manifold which is connected to a nipple on the BOV and it opens a valve where the air goes out. Does that make sence?

BlaCkPlaGUE

The guage 'should' read vacuum at idle, this is completley normal. It should move up though during the rpm scale, and should not sit at 0 or just above it.
Sounds like you have a major boost problem. could be a few things, and I doubt its the gasket.

Most of the exhaust gaskets that fail are the ones that are at the downpipe, the manifold to block gasket usually isn't a culprit (not that I've seen). How do you know its the manifold gasket and not the downpipe? if its the downpipe gasket this will have nothing to do with not getting any boost.
Check the manifold while the engine is running (be carefull) and see if you can pinpoint the exhaust leak. If you can't find anything, wait till the car is cooled down and check the manifold for cracks, like big ones that you can see into!
Pull the TID off and the afm, spin the compressor wheel with your finger, it should move very freely, and should only have like 1mm of shaft play or so. If its not spining at all, theres your problem...
With the car running, get some soapy water and a spray bottle and spray all rubber hosing connections/flanges that connect from the turbo, to the intercooler, all the way down to the block and see if you get any bubbling while reving the engine. If you do, that particular hose/clamp/gasket may need to be replaced.
There is seriously alot to cover with a problem like that, start searching, read the faq, check the archives and go from there.

bamabubba

Yes, thanx. Now is the wastegate adjustable? How do i check to see if its working?
Jeremy

bamabubba

I dont actually know if its the down pipe or the exhaust. Im just going by what the guy i got it from told me....and he already bought the exhaust gasket.
What did you mean by TID? Sorry, im completely clueless.
Jeremy

bamabubba

Also on a side note...if it turns out my turbo is bad i have a garret turbo from an 86 svo mustang. Is this turbo bigger or smaller than the 7s turbo? Can this be used?
Jeremy

Landon303

iTrader: (25)

as far as interior panels go, check out www.mazdatrix.com, they have a whole buncha OEM replacement parts, pretty much everything. congrats on the new car though!

bamabubba

Thanx man. Hey I went out to look at the car a minute ago but it was getting to dark to do anything to it. I did drive it up the road paying more attention to the guage. It would go up to the second little bar past 0 then it would just drop back past 0 even while i was still acclerating. I also noticed that when i hit 6000 rpm the car bucked for a sec or two before acclerating again. Sound like a familiar problem to anyone?
Also im including a pic of a valve that is right above the turbo that has a vaccum line missing. Anybody know what this is? Also...my car has no power steering and my tail lights are square. I thought turbos had the round tail lights? I figured that all turbos had power steering. Anyway, thanx for all the replies guys.
Jeremy

http://img.photobucket.com/albums/v4...7/jy040003.jpg

http://img.photobucket.com/albums/v4...7/jy040000.jpg

Here is the car.
http://img.photobucket.com/albums/v4...7/jy040009.jpg

rx7ryan

that vacuum line looks like it is part of the emissions rat's nest. i haven't seen a rat's nest in a while so i don't know, plus i can't really tell exactly where that is in the engine bay. i'm not sure about the power steering, but i'll tell you about the taillights. you have a s4. your car was born between 86 and 88. turbo model has nothing to do with the taillights. i have a s5 so i have the round lights. you can look for a write-up on changing to s5 tails if you look around the 2nd gen archives section. you should probably do that anyway just for your own general knowledge of the 7. look around the archive for a few hours and you'll learn a whole lot. make sure to hit up the acronym section. TID is in there. that's "Turbo Inlet Duct". basically from your intake to the turbo.

fc3sfreek

iTrader: (6)

thats not an 89' its an 87' i was gonna buy it for 1200 but i guess u got to it before i did. its has 150,xxx miles rite? and the lights are hardwired to daytime driving lights rite?

Landon303

iTrader: (25)

power steering wasn't standard on the turbo model. so you either dont have it (like me) or you have it with a broken belt or something (highly unlikely, check for a pulley with no belt going to it) at the top of the thread listings are a few threads perminitly there, and they can help ya out with what your car came with and what not... youll see lol. oo hey, just incase you dont know, rx-7's like to be warmed up to operating temperature before you get on the throttle alot. so untill its up to normal temp, drive it easy, and keep it under 3K rpm for the first 5 or so minutes, just so it warms up evenly. well thats about all i've got, good luck man & have fun

YearsOfDecay

Congrats for lowering your intake manifold vaccume!!!!!

Now.. join the rest of us and get a snowshovel and start shovelling dollar bills out the window!!!!

bamabubba

LMAO!!! thanx man. Ill try to have fun in the process.
Jeremy

bamabubba

Hey man. Thanx for the power steering info. Yea, i knew 7s needed to warm up a bit.
I used to have an 85 gsl.
Jeremy

bamabubba

Yea, my bad. I meant to type 87 but was thinking about something else....lol. My bad... but yea, this is the car. I got some serious work to do on the interior wiring...lol. And its just the running lights that are hard wired. Even with the problems to fix im very happy with it. That was a looooong drive though. And surprisingly, even with the boost problem and exhaust leak, the car still got about 26mpg on the way home.When were you gonna go up and get the car?
Jeremy

fc3sfreek

iTrader: (6)

i was actually supposed to get it like a month ago but then i coodnt go up ther. and i recently e-mailed him i was just waiting for him to call me or e-mail me bak then i was gonna go get it. but oh well... enjoy it

bamabubba

im gonna do my best to...lol.
Jeremy

bamabubba

Ive been watching the boost guage and im wondering if the turbo would boost at all if it was damaged. I think the wastegate is to blame. How can i check to see if its operating right?
Jeremy

Turbo 3

iTrader: (3)

Go to http://www.iluvmyrx7.com and look up the 2nd gen section. I serioulsy doubt your WG is to blame. Considering the miles, your turbo is most likely shot in the bearing. If that's the case the bearing section will need to be rebuilt which is about $300 to do considering who you have do it (parts and labor).

I had the same thing happen to me with boost not getting past 0 psi but it was squealing like crazy and sounded really bad.

You have a lot of work ahead of you with preventative maintenance to make sure everything is ok just stock before you get ahead of yourself and try to start making more power.

Replace all the filters, fluids, vacuum lines, plugs, plug wires, get it timed, adjust your TPS, bearing grease in the half shafts, etc.