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-   -   Fuel Injector Info (https://www.rx8club.com/series-i-tech-garage-22/fuel-injector-info-150432/)

MazdaManiac 07-09-2008 04:30 PM

Fuel Injector Info
 
I wanted to put all of this in one place for reference.

PRIMARY INJECTORS
RED 290cc

6-PORT SECONDARY INJECTORS & PRIMARY 2 INJECTORS
YELLOW 380cc

4-PORT SECONDARY INJECTORS
BLUE 480cc

Injectors are Bosh disc-type, high impedance (13 ohm) with a Denso connector.

http://www.mazdamaniac.com/images/misc/inj5.jpg

http://www.mazdamaniac.com/images/misc/inj.jpg

http://www.mazdamaniac.com/images/misc/inj2.jpg

the_duke313 07-10-2008 01:33 AM

just outta curiousity why does the 4 port hav bigger injectors?

swoope 07-10-2008 01:37 AM

same size engine. two less ports..

beers :beer:

Brettus 07-10-2008 02:06 AM

didn't you mean to say two less injectors swoope ?

swoope 07-10-2008 02:18 AM


Originally Posted by Brettus (Post 2544615)
didn't you mean to say two less injectors swoope ?

not really..

same answer in the long run.. ;)

less ports = less injectors..

beers :beer:

MazdaManiac 07-10-2008 02:38 AM

6-port = 6 injectors (2100cc total)
4-port = 4 injectors (1540cc total)

swoope 07-10-2008 02:42 AM

sorry.

forgot to mention.

less ports, less rpm..

beers :beer:

swoope 07-10-2008 02:51 AM

but the point is tech info.

this should be a sticky.. !! o wait it is!

beers :beer:

tdiddy 07-10-2008 08:53 AM

What type of connectors do the OEM injectors have?

the_duke313 07-10-2008 07:09 PM

icic i figured that but didnt know for sure
thanks

ShadowHunterXXXI 07-14-2008 06:17 PM

So I have a new engine in my car thanks to some water that hyrdolocked my old one... dont ask. Anyway, the fuel trim is off according to the mechanics. Well I asked someone at Mazsport, they said maybe the injectors were backwards. Any ideas? Im kind of confused seeing as it's two and four not three and three or something like that...

MazdaManiac 07-14-2008 08:02 PM

Try looking at the first post of the thread.
If that doesn't answer your question, nothing will.

BTW - you can't "hydrolock" a rotary motor.

rotarygod 07-14-2008 11:17 PM

I can verify that. Flood waters couldn't do it!

ShadowHunterXXXI 07-15-2008 10:31 PM

Well then the techs at Mazda are idiots. They tried to turn it with a breaker bar and it didn't turn, with the spark plugs removed. Any ideas?

the_duke313 07-15-2008 11:00 PM

yup i agree mazda techs are idiots. i wont be taking my car there unless absolutley necessary

swoope 07-15-2008 11:30 PM


Originally Posted by ShadowHunterXXXI (Post 2553229)
Well then the techs at Mazda are idiots. They tried to turn it with a breaker bar and it didn't turn, with the spark plugs removed. Any ideas?

yea,

take it out of gear and take off the e brake...

beers :beer:

MazdaManiac 07-16-2008 12:41 AM

If it were "hydrolocked", pulling the plugs would "un-hydrolock" it.
What led to the motor being in this condition?

olddragger 07-16-2008 10:19 AM

carbon lock?
OD

MazdaManiac 07-16-2008 10:36 AM


Originally Posted by olddragger (Post 2553797)
carbon lock?
OD

Possibly. Though, you seldom hear of a car stopping in its tracks from carbon lock.

ShadowHunterXXXI 07-16-2008 06:07 PM

How it happened...
 
Well lets see. Here in Iowa, about a month back, we had a lot of rain coming down. Well one night my car and I went through this puddle of water. The AEM CAI decided that it would suck up the water instead of air, causing it to stall. Pushed it out of said puddle and let tried it. Nothing. Left it alone for a day to dry out and tried to turn it over. Nothing. Towed it to the only Mazda dealership in town, thinking they should know what they are doing. They said they took the plugs out and tried to turn the engine with a breaker bar and still couldn't get it to budge. So they replaced it. Then after I had it for a few days, the CEL comes on. I take it back, they say ignition coils. They pop new ones in and find that the fuel trim is off. Excessive as they say. A week later and I'm still car-less. Worse yet, they gave me a damn minivan. So please help in anyway possible. I asked a tech at Mazsport, they said maybe they got the injectors backwards, primary and secondary. From what I read, it might have been the MAF or O2 sensor. According to the techs though, they said they can test the MAF and found it to be OK. Now they want to replace my AEM CAI with the stock airbox. No thanks. Any ideas on how to keep my CAI and fix this fuel trim issue? Take it to a tuning place and reflash the ECU? I have no freaking idea...

tajabaho1 07-16-2008 06:41 PM

el oh el.......... I just saw this,

MazdaManiac 07-16-2008 06:50 PM


Originally Posted by ShadowHunterXXXI (Post 2554580)
They said they took the plugs out and tried to turn the engine with a breaker bar and still couldn't get it to budge.

Strike one.



Originally Posted by ShadowHunterXXXI (Post 2554580)
So they replaced it.

Awfully nice of them. I presume this was under warranty?



Originally Posted by ShadowHunterXXXI (Post 2554580)
Then after I had it for a few days, the CEL comes on. I take it back, they say ignition coils. They pop new ones in and find that the fuel trim is off. Excessive as they say.

Strike two.



Originally Posted by ShadowHunterXXXI (Post 2554580)
According to the techs though, they said they can test the MAF and found it to be OK.

He winds up for the pitch....



Originally Posted by ShadowHunterXXXI (Post 2554580)
Now they want to replace my AEM CAI with the stock airbox.

Strike three!

They left your snorkel in the car, but gave you a free engine?
How, exactly, did they "test" the MAF?
What code did you throw?

tajabaho1 07-16-2008 06:52 PM

Hey guys, I would like to announce that I am running my car with mazsport injectors with a stock ecu

I want to know whether it would damage the engine in anyway?

this is only temporary until i finish my turbo install ofcourse..

MazdaManiac 07-16-2008 07:02 PM

It'll run like crap with no engine management.

tajabaho1 07-16-2008 07:09 PM

it does run like crap Jeff!!!, but I'll be out there to AZ mid august when Ray moves there so you guys can do your Uber magic on my car :D

however, I will be running there with *gasp* base tune

however, will it hurt my car though? in the long run I mean


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