Jump to content

Welcome to Ultimate Subaru Message Board, my lurker friend!

Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.

We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
  • Say hello and join the conversation
  • Subscribe to topics and forums to get automatic updates
  • Get your own profile and make new friends
  • Classifieds with all sorts of Subaru goodies
  • Photo hosting in our gallery
  • Meet other cool people with cool cars
Seriously, what are you waiting for? Make your life more fulfilling and join today! You and your Subaru won't regret it, we guarantee** it.

* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!

Serving the Subaru Community since May 18th, 1998!

Guest Message by DevFuse

- - - - -

XT/MPFI injector wire issue

  • Please log in to reply
No replies to this topic

#1 Gloyale


    It's a sickness

  • Members
  • 10,835 posts
  • Corvallis, OR PNW

Posted 27 February 2008 - 04:03 PM

So, after several member threads about problems with injectors not firing, I though it time to sticky some of this info.

As many of us Know, when Fuji wanted to splice 2 wires, they did it with a simple brass crimp, wrapped in tape. And, lot's of them are under the Carpet. Most noticably the PW + supply split, and the subject of this post, The MPFI fuel injection signal(neg) wires.

They originate at the ECU from pins 49,50, And 51,52. Then join shortly as one wire each pair. The injectors fire in pairs, So this first connection is just a redundancy. It is also not far from the ECU in the harness, so not wet or likely to corrode. Still, if both in a pair aren't firing, this is a suspect.

But by far the more likely is the crimp connections where the wires seperate again to go to there respective injectors. This connection is in the harness that runs under the RH seat, under the carpet. Even worse is that damp carpets corrode the wires in in a nice perfect ring around the brass crimp, eventually severing the wire.

The end of this thread http://www.ultimates...=injector trunk
has great pictures of the wires, and how they break. As well as a good treoubleshooting lead up in the first 3 pages. I suggest it be merged with the info I summed up in my above statement, and put in the USRM

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users