Notices
Series I Tech Garage The place to discuss anything technical about the RX-8 that doesn't fit into any of the categories below.

Wiring Harness for Fuel Injector Hookup

Thread Tools
 
Rate Thread
 
Old Apr 10, 2012 | 03:44 PM
  #1  
anoble1's Avatar
Thread Starter
2004 RX8 Owner
 
Joined: Mar 2009
Posts: 146
Likes: 0
From: Pelham, Alabama
Wiring Harness for Fuel Injector Hookup

Hi,
I have just had the engine rebuilt a week ago. I put the new rebuilt engine in yesterday and I cannot figure out which Fuel injector wire goes where, and to which injector. I took a picture of the 4 TOP injectors. I know the wires have all different colors. Can someone help with the wiring diagrams for the 6 injectors?


I ran across this thread and saw the diagrams but I don't know if its (left to right, or right to left from my photo, and I still have 2 injectors that are circled in red)

https://www.rx8club.com/series-i-trouble-shooting-95/fuel-injector-harness-connector-209685/
Attached Thumbnails Wiring Harness for Fuel Injector Hookup-injector.jpg  
Reply
Old Apr 10, 2012 | 04:04 PM
  #2  
anoble1's Avatar
Thread Starter
2004 RX8 Owner
 
Joined: Mar 2009
Posts: 146
Likes: 0
From: Pelham, Alabama
Here is the answer. I looked over it somehow.

https://www.rx8club.com/series-i-tech-garage-22/fuel-injector-info-150432/
Reply
Old Jun 22, 2015 | 04:57 PM
  #3  
JaredP's Avatar
Registered
 
Joined: Apr 2015
Posts: 29
Likes: 0
This thread keeps popping up when I search and the other linked thread has the harness colors a page or two in so I am going to post it here too. Just to help others searching like my self.


Fuel Rail 1 (two injectors)
Both leads for this fuel rail come off of the main harness together.
Front rotor injector wire color is light-green and red. (Front Primary 1)
Front injector Wire lead has White colored tape

Rear rotor injector wire color is light-green and black. (Rear Primary 1)
Rear injector Wire lead has Tan colored tape.

Fuel Rail 2 (four injectors)
The two center (the middle) injector wires come off the harness together and split.
Front side of the middle split has Yellow colored tape.
Rear side of the middle split has Green colored tape.
The two end (front and rear) injector wires come off the harness separately and have no colored tape.

The front injector wire is Green and Red. (Front Secondary)
The front rotor middle injector wire is Black and Blue. (Front Primary 2)
The rear rotor middle injector wire is White and Green. (Rear Primary 2)
The rear injector wire is Black and Blue. (Rear Secondary)



Also found this too. Yikes.
Yeah it varies, there really is no rhyme or reason to why some are different. We just did an 05' not too long ago that matched that ^ exactly. But some the wires on another harness we have on hand was different. Everything is properly labeled now when we do it, it's not worth the hassle.
Reply
Old Jun 22, 2015 | 05:17 PM
  #4  
9krpmrx8's Avatar
SARX Legend
iTrader: (46)
 
Joined: Jan 2007
Posts: 33,788
Likes: 462
From: San Antonio, Texas
Yeah it gets confusing, and having personally gone thru the wiring on different year RX-8's I can confirm they are different colors.

There is this as well.

Reply
Old Jun 22, 2015 | 05:27 PM
  #5  
TeamRX8's Avatar
Registered
iTrader: (25)
 
Joined: Apr 2005
Posts: 26,936
Likes: 2,141
Mine matched my model year factory service manual to a tee ...
Reply
Old Jun 22, 2015 | 08:34 PM
  #6  
JaredP's Avatar
Registered
 
Joined: Apr 2015
Posts: 29
Likes: 0
I just plugged mine in the way 9k posted up. Runs great now.
Reply
Old Jul 11, 2015 | 01:03 PM
  #7  
Rote8's Avatar
Registered
 
Joined: Oct 2007
Posts: 1,574
Likes: 2
From: Boosted...
Originally Posted by 9krpmrx8
Yeah it gets confusing, and having personally gone thru the wiring on different year RX-8's I can confirm they are different colors.

There is this as well.

A picture is worth a thousand words.


Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
RevMeHarder
New Member Forum
8
Jun 1, 2026 02:30 PM
ÜberJumper
Canada Forum
21
Feb 20, 2025 11:57 AM
Carbon8
RX-8's For Sale/Wanted
42
Feb 27, 2020 08:39 AM
DVerdeyen
RX-8 Parts For Sale/Wanted
6
Sep 29, 2015 10:31 PM
tgaffner
New Member Forum
3
Sep 7, 2015 08:49 PM



You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -5. The time now is 11:10 PM.