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-   -   Misfire... after swap (https://www.rx8club.com/series-i-trouble-shooting-95/misfire-after-swap-264734/)

Zman7 03-05-2017 06:21 PM

Misfire... after swap
 
okay so I had a very bad misfire and the engine would stall, and then not want to restart.

I swapped the coil harness connectors (very limited info for correct order anywhere)

It now runs fine after 3000 RPM but at low RPM has trouble making power and sometimes will die at idle

I have an extra set of coils and wires that I've swapped that makes no difference

I have changed the plugs twice to no avail

One thing I am concerned with is the injector plugs on the intake manifold I was able to find that a blue one is on the top, correct?

And there is a black and white plug underneath them I have no idea what order they go in.

Could that be what's causing this issue?

Zman7 03-05-2017 06:23 PM

I want to add, I did the poor man compression test and got three very fast pops.

And even after running the car for hours , it starts back up immediately with no problem after a stall.

It does smell like it's running super rich

dannobre 03-05-2017 06:29 PM

Look for the wiring diagram and then match the trigger wire colors for both the injectors and the coil plugs

If you can't find it i can send you a link

Zman7 03-05-2017 06:30 PM

I've looked everywhere for days lol

If you have link please share thanks!

Zman7 03-05-2017 06:32 PM

1 Attachment(s)
Here's what I have for the coil harness...
But not all of wires match what I have???
Lol...

One has white tape and a yellow mark on plug
I've got that one on #3 coil

dannobre 03-05-2017 06:54 PM

http://www.mediafire.com/file/5nn4qq...Electrical.pdf

use the wire colors to figure it out ;)

Zman7 03-05-2017 07:29 PM

Wow that is amazing��
I wish I had it two weeks ago lol

It looks like I have the coils correct now..
Except coil 4 wire colors don't match mine exactly...
But the others do.
Assuming it's like (black/green white blue)
Where bg w and b means the above

Maybe someone can make the next part easy

I wanna check the 3 plugs under the intake

Right now I have
Blue plug
White plug
Black plug

Going from top to bottom that order.

If no one knows, I'll dig in the wire loom to see the wire colors.

Its really easy to see the plugs just by looking under the intake tho...

So if anyone wants to help������

Zman7 03-05-2017 08:47 PM

Page 15 confirms the order
Blue On top(secondary air injection solenoid valve)
White middle (secondary shutter solenoid)
Black on bottom (variable dynamic effect intake valve)


So now, onto the injectors!

Zman7 03-05-2017 11:18 PM

Issue solved!
B1-30 and b1-31 injector plugs needed swapped

Now she runs like a top;)

mazdaverx7 03-06-2017 05:38 AM

Glad to hear you got the car fixed! If you run into more trouble, I have a complete engine on my garage floor that I can take pics of for reference.

RX_4+4 03-11-2017 10:29 PM


Originally Posted by dannobre (Post 4808331)
http://www.mediafire.com/file/5nn4qq...Electrical.pdf

use the wire colors to figure it out ;)

Wow, That is an awesome diagram. You people can read and follow that? No really? I couldn't. I have rewired motorcycles with diagrams but that stuff there is uptown charlie brown.

dannobre 03-12-2017 01:29 PM


Originally Posted by RX_4+4 (Post 4809166)
Wow, That is an awesome diagram. You people can read and follow that? No really? I couldn't. I have rewired motorcycles with diagrams but that stuff there is uptown charlie brown.

LOL. ...it's not as bad as it looks. Follow the interconnections between pages and you can figure it out


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