Rx7 mind-boggling issue...

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05-11-2008, 10:59 PM
CobaltSSTuner

Rx7 mind-boggling issue...

So, I have a 90' Mazda Rx7 13B non turbo. Ive had it since i graduated in highschool (4 years) and the "apex seals" took a crap a while back. (or so i was told) I found a guy who was selling the same motor with like 50k miles on it so I bought it, had my dads buddy do the motor swap (in the meantime my system got jacked, different story) and put the car in storage until 2 months ago, when i quit my job. The shape of the body is outstanding for being a 90 rx7. minus the broken mirror, which i'm replacing relatively soon.

Now that its home, i've been working on it trying to get it to run, because when they did the motor swap they couldnt get it to run. The guy that we bought it from, swore that the motor was good.

Well, 2 weeks ago I got it running, idles great, smokes a little (white smoke). The problem is that it idles in park and in neutral, but when i put it in reverse, drive, ect, it stalls/dies and it wont start up until the next day (probably because its flooding out) Would anybody know what may cause that?
05-11-2008, 11:09 PM
That_Guy

well from what i gather.. your first problem is that it has a rotary engine in it...

here is what you need to do..

dump the rotary and get a freakin ls1

problem solved
05-11-2008, 11:12 PM
CobaltSSTuner

everytime your the first poster in my thread it goes to shit, GTFO! :D Go post whore in someone else's thread lol. I'd throw a LS1 in it by now if I wanted. I'd rather get it running, sell it and turbo my balt.
05-11-2008, 11:34 PM
Cryptic

I would take that question to rx7club.com if you haven't already.
- a bad ground?
- bad computer connection?
- bad computer?
05-11-2008, 11:38 PM
That_Guy

this car is freakin mint.. its almost like it was in a time capsule.
05-11-2008, 11:38 PM
CobaltSSTuner

Quote:

Originally Posted by Cryptic

I would take that question to rx7club.com if you haven't already.
- a bad ground?
- bad computer connection?
- bad computer?

yea, last time i was on there (no offense to you) I got flamed hardcore. A few decent people tried to help, they were saying maybe a fuel filter, Throttle positioning sensor, or a vaccum (sp?) line. I have a haynes build book on it, ive been reading through it. I kind of want to say that the mechanic installed something wrong, because when i checked the plugs, they weren't in right. he had the both of the lower plugs in the left, and the top plugs on the right side. When i saw that i fixed that, checked the plug wires and coils, all the basic stuff. I know a decent amount about motors and fixing stuff, but when it comes to rotarys i know the basics. I've never heard of anything like this before :alcoholic
05-11-2008, 11:40 PM
CobaltSSTuner

Quote:

Originally Posted by nramlow2006

this car is freakin mint.. its almost like it was in a time capsule.

true that. a few exterior dings minus the broken mirror and this body is in great shape along with the interior.
05-11-2008, 11:44 PM
Flicktitty

i'd say a RX7 forum. i thiink every RX owner on here besides cryptic has a v8 lol.

Oh or call a RX7/rotary shop explain there problem they might have sum sort of lead for ya ?
05-11-2008, 11:49 PM
CobaltSSTuner

tried that. most of the rotary shops i talk to either have alziemers (sp?) or won't tell you jack....
05-11-2008, 11:52 PM
KARKRAFT

I wish I had something of value to offer to this thread, but I know nothing about rotary motors....so I'll just stare at your signature.
05-12-2008, 12:22 AM
Flicktitty

Quote:

Originally Posted by CobaltSSTuner

tried that. most of the rotary shops i talk to either have alziemers (sp?) or won't tell you jack....

you call up A-Spec tuning?
05-12-2008, 07:56 AM
CobaltSSTuner

Quote:

Originally Posted by KARKRAFT

I wish I had something of value to offer to this thread, but I know nothing about rotary motors....so I'll just stare at your signature.

thats cool lol
05-12-2008, 07:59 AM
CobaltSSTuner

Quote:

Originally Posted by Flicktitty

you call up A-Spec tuning?

no i have not, you reccomend them? I'll give them a ring.
05-12-2008, 08:59 AM
Myles

So its an auto?

most signs are leaning towards computer is jacked. The idle is wrong for the in gear table. what year is the motor?

Also check to make sure the IAC is good. Check all the nescesary items fuel filter, make sure has good plugs blah blah. When it floods out like that put gas at WOT and start cranking the engine. It shuts the injectors off and you should be able to start it after a couple cranks. Pouring ATF down it works as well, least it worked for mine and all the ones ive worked on.
05-12-2008, 09:48 AM
Cryptic

vaccuum lines is an excellent suggestion... those things dry rot/crack esp since they are 18 years old. Not un-common to have to re-do them.

And there's only like 60+ of them on the TT's
05-12-2008, 10:24 AM
CobaltSSTuner

Quote:

Originally Posted by Myles

So its an auto?

most signs are leaning towards computer is jacked. The idle is wrong for the in gear table. what year is the motor?

Also check to make sure the IAC is good. Check all the nescesary items fuel filter, make sure has good plugs blah blah. When it floods out like that put gas at WOT and start cranking the engine. It shuts the injectors off and you should be able to start it after a couple cranks. Pouring ATF down it works as well, least it worked for mine and all the ones ive worked on.

I havent checked the fuel filter yet. Whats weird is that when it stalls out from putting it in gear, it doesnt start. Even when i push the pedal to the floor and turn it over. It does nothing. The motor is from a 90 rx7. Not to sound like a n00b, but IAC? Intake Air Compression?

Quote:

Originally Posted by Cryptic

vaccuum lines is an excellent suggestion... those things dry rot/crack esp since they are 18 years old. Not un-common to have to re-do them.

And there's only like 60+ of them on the TT's

Thats my thinking. I've looked over most of them, but it never hurts to look again.
05-12-2008, 11:09 AM
Myles

IAC - idle air control

But as cryptic said check all vacuum lines, those things are nightmares when it comes to that. reset the computer check the grounds check the wiring. Hell if you can get your hands on another computer to check that would help limit the possibilities of whats wrong.
05-12-2008, 11:42 AM
Yooformula

nothing useful to add but that sig rocks. carry on.
05-12-2008, 12:24 PM
That_Guy

Quote:

Originally Posted by Yooformula

nothing useful to add but that sig rocks. carry on.

o and i get bitched at by other members for doing the samething...

but i guess if you own this place you can do as you want.
05-12-2008, 12:29 PM
theavenger333

Quote:

Originally Posted by nramlow2006

o and i get bitched at by other members for doing the samething...

but i guess if you own this place you can do as you want.

we actually like him....
05-12-2008, 12:51 PM
That_Guy

Quote:

Originally Posted by theavenger333

we actually like him....

OOOOOOOO. ok this makes sense.:rolleyes:
05-12-2008, 01:02 PM
Myles

jesus ******* christ shut the **** up already. Stop shitting on this thread.
05-12-2008, 01:11 PM
Deggy

Quote:

Originally Posted by Myles

jesus ******* christ shut the **** up already. Stop shitting on this thread.

PWNAGE! :headbang
05-12-2008, 01:22 PM
Flicktitty

Quote:

Originally Posted by Myles

jesus ******* christ shut the **** up already. Stop shitting on this thread.

Bamboo stick!

BALLS BALLS BALLS lol

oh i'm getting that seat tomarrow or wens.
05-12-2008, 01:45 PM
CobaltSSTuner

this is one thread that i will not allow nate to post whore in lol...

Quote:

Originally Posted by Myles

IAC - idle air control

But as cryptic said check all vacuum lines, those things are nightmares when it comes to that. reset the computer check the grounds check the wiring. Hell if you can get your hands on another computer to check that would help limit the possibilities of whats wrong.

I'll look into the extra ecu and see what i can come up with.

I do appreciate everybody's help so far!

Quote:

Originally Posted by Yooformula

nothing useful to add but that sig rocks. carry on.

lol, thank you sir :shades

Quote:

Originally Posted by theavenger333

we actually like him....

Thats good to know...i guess :rolf
05-12-2008, 02:15 PM
Prince Valiant

Being a swap, Vacuum seems likely...when you get a vacuum leak, air is coming in unmetered, which leans things out. This will oftentimes create a high idle situtation. This may lead the IAC or TPS to overly compenstate and restrict air and fuel more...the subsequent increased resistance to putting it in gear leads to it not being able to correctly compensate the throttle settings and it dies. Why it doesn't restart, less sure...but probably due to trying to keep a normal idle with a vacuum leak has left it in a poor posisiton to start.

Old vacuum lines will generally tear at the edges when pulled off as what happened pulling the eginge. Putting them on again over the lip certainly didn't help either.

The haynes should have an alright trouble shooting guide for this car though...go through it and see what it says about stalling in gear, trouble restarting.
05-12-2008, 02:21 PM
CobaltSSTuner

makes sense, thanks for the great info!
05-20-2008, 01:31 AM
boostaddict14

A-spec call them.
rotary genius's