Hi guys, am new here.

I have a 92 model RX-7 & the twin turbo's are not working correctly.

A friend told me the 2nd turbo should come in around 4000rpm but instead the engine dies off after that & loses power.

I just paid $14k for the thing & am concerned now. Does anyone have some advice on what I should look at first. Would prefer to fix it myself so I can learn more.

Ultimately, I would like to upgrade to the 20B-REW engine but want to get this 13B-REW going properly first.

 

OK, here's the deal. You can probably fix it - the problem is likely a burst boost hose, popped/cracked vacuum hose, or faulty solenoid. Time consuming to diagnose, not expensive to fix yourself if you are patient.

They all are a matter of basic inspection. To test your system, you'll need to have a vac/boost gauge (either a mounted gauge like a Defi, Greddy, Autometer, etc). But since you're already troubleshooting, I suggest one of those big pressure/vacuum gauges that you can get at Autozone, a 1/8" tee fitting, and 8' of 1/8" rubber vacuum hose. Ideally the gauge will do 25inHg vacuum through 15psi pressure (mine stops at 10psi). When troubleshooting, I run the hose under the hood past the wiper, into the passenger window to the gauge taped onto my dash. I leave my regular boost gauge configured as normal.

This guide tells you how to troubleshoot all parts of the turbo system:
http://www.autosportracetech.com/RX-...leshooting.htm, but it's kind of all dumped on you at once. But a very valuable resource.

Next, have a copy of the vacuum hose diagram on hand (print it in color if possible) and use it to navigate the system. The solenoids which affect boost are E, F, H, I, J, and the 'unlettered' Turbo Control Solenoid on the upper left of the chart. Here is the one I use:
http://web.newsguy.com/geesaman/vac_...iagram_dlg.jpg

First, you should take that boost gauge and plug it into the nipple on the UIM (labled near the top of the vac diagram). 10-8-10 is normal, but you may see 10-8-0 if the secondary isn't coming online properly at 4500rpm. Start by looking all around for popped off vacuum hoses or slits in the piping. BE CAREFUL with the hoses and solenoids - they can be very fragile.

If this is the case, I would jump here: http://www.scuderiaciriani.com/rx7/boost_problems.html and follow the procedures by Steve Wynveen (Sat 5 Sept 1999) and Wael El-Dasher (Sun, 12 Dec 1999). They're about halfway down the page.

With care and a long needle-nose pliers, I was able to tee into all of those lines and test all of them in a couple hours (I just pulled over, let the car idle, and moved the tee to the next location - thus getting me back on the road quickly for the next test). This should give you a real good idea what component is at fault - and then you can take off the UIM and test the parts according to Mazda procedure.

I got my information from the newbie posting. It has a topical list of choice links, and a FAQ. The information in the FAQ is considered background knowledge here, if you learn it you'll be very well set for ownership. Take a good look at the 'vac hose job' links - something you may want to do for your car.

Dave

 

btw, just a nit to pick, but there is no such things as a "92" FD. 1993 was the first model year here in the states. your vin should tell you the model year.

if the car is titled as a 1992, I would definitely want to check into the history of the car. something is not right.

good luck,

-bill

 

Right. To clarify, the 93s were manufactured in 92 and even very late Dec 91. But they all should be registered as 93s.

Dave

 

hey there.

Thanks for the kind info on that troubleshooting. I will certainly keep you all posted on the developments as I attempt to rectify the problems.

As for calling my 92 RX-7 a 93 model.........??

I dont know about that, the sticker inside the door says it was built in FEB-92 so that makes it a 92-model in my eyes. Not into the bullshit about calling the car something it isn't, sorry guys. Prefer to be practical..........

 

Call it what you wish, but (nearly) all the 93s here have a 92 build date. It IS a 93.

Dave

 

Practically wrong

 

Check the VIN section of this FAQ with your VIN:

http://www.k-rad.com/3genfaq

 

so the new '05 mustangs are really 04's. so you mean every new car that gets released before christmas this year, that the dealers are calling 05's are really 04's. yeah right next you are going to try and tell me SANTA isnt real!

 

hey guys.

Dont want to get any noses out of joint but I was raised to call a spade-a-spade & really dont go for the marketing bullshit forced down on us.

If my car was built in 1992, then its a 1992 model no matter what anyone tells me.

If it was built in 1993, then I would agree with you all. In fact after reading this great web site. I found that Mazda started building them in late 1991 & stopped in late 2002, wow - what a production run hey

Anyway, am more concerned with getting my boost problems sorted out.

Big thanks again to dgeesaman for your time . Am into it this weekend...........

 

One of the issues in any communication is that you have to settle on a common set of definitions. The "Model Year" of your car is a 1993. The "Build Date" of your car is in 1992. If you go about making up your own terminoogy, you just end up sounding foolish. If you want help out of this forum, then you will need to accurately describe your car, and that includes model year. For instance, there are differences between the 1993 and 1994 models that may relate to your questions. Saying that you have a "1992" means nothing to me.

BTW, Mazda kept selling FC's well into 1992 in order to reduce stock. These cars are still referred to as "Model Year 1991".

I'm not trying to bust on you here, just trying to help. But *you* are the one who insists on calling "black" as "white", not the other way around.

-bill

 

Well, you where born in 1983.

Does that make you a 1984 model baby...........???

or

If my RX-7 was built in FEB-92 & its suppossed to be a 93-model, Does that mean that a FEB-93 built RX-7 is called a 94-model.....???

or

What do you say to someone from Japan on this forum that has a 92-model RX-7 like mine. Do we say to him that us Americans are better & we should call his 92-model a 93 aswell. Regardless of him thinking we are all ******* for impossing this crap onto him.......???

This is getting quite sad. Even the guy I bought my RX-7 from called it a 92-model & another friend I have that inspired me to get this car also has a 92-model that we all know of as a 92-model.

This internet is wonderful, I found out the FC RX-7 stopped production in SEP-91 & our FD's started in OCT-91. Although it would be logical that some FC's were still floating around into 1992 on the dealer floors.

 

But you're applying human terminology to cars which just doesn't cut it.
I realize that car Model Years may make no sense to you but that's the way it is and there's nothing you can do to change it.

There are also countless other products that name the years the same way as the automobile industry. Sports cards and sports video games are one.

The guys here are just trying to help you out. If you go around in public calling your 93 FD a 92 you will surely get chastized by anyone who knows anything about these cars and I highly doubt that is something you would want.

 

He just doesn't get it, does he?

 

When I lived in the UK for a year, where they titled my american spec 93 (build date 1/92) as a 92 model. It seems everywhere, but the US, called them 92s.

 

hey man you just dont get it. you cant go around calling a 93 Fd a 92. i tried looking it up on kelly blue book in case i was mistaken. There were no 93 Fd's.

think about this, when you go to buy parts for your car are you going to say you have a 93 fd or a 92. because they might get mistaken and send you parts for an fc.

so quit with your one man revolution to change this, and to be honest with you you are only screwing yourself.

oh and last thing, the first thing you said on your thread was "Hi guys, I am new here" take this as a learning experience.

 

Actually, you again have that backwards - your "build date" may well have been in 1982! (hint: think 9 months earlier). So are you an '82 model or an '83 model?

It depends, when did the production line start building the 1994 models? Here's a clue: the VIN changed. Here's the significance: there are noted differences between the 1994 and 1993 model lines. The model years *mean* something. The build date (which you inanely insist on calling the model year) also has meaning, but only in certain conversations.

I could claim that I have a "1999 RX-7" because that's when *I* bought the car! Calling my car a 1999 RX-7 is about as meaningless as you calling yours a 1992 model. Continually insisting that I have a 1999 RX-7 would make me look like a moron.

But you don't *have* a 1992 Japanese model, do you?

I just give up, this is like trying to teach a pig to sing.

-bill