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
 

Photo
- - - - -

spfi conversion trouble


  • Please log in to reply
8 replies to this topic

#1 84gl

84gl

    Eat, Live, Breath Subaru

  • Members
  • 291 posts
  • Southwest VA

Posted 29 March 2005 - 10:09 AM

it is a 86 5spd 4wd sedan i picked up about 9 months ago with carb trouble so, i decided to convert it over to spfi a few weeks ago. well to get it the point i have all of the conversion done but i can't get it to run have power at pins 27,29.41 and 49 have grounds at all the grounded pins but no power to feul pump. feul and ingition relays are good have check them. no trouble code light on the ecm don't know what to do next please help


p.s this is not my first conversion and the donor car is a 91 2wd auto

#2 gunslinger

gunslinger

    USMB is life!

  • Members
  • 167 posts
  • Gold Bar

Posted 29 March 2005 - 01:56 PM

it is a 86 5spd 4wd sedan i picked up about 9 months ago with carb trouble so, i decided to convert it over to spfi a few weeks ago. well to get it the point i have all of the conversion done but i can't get it to run have power at pins 27,29.41 and 49 have grounds at all the grounded pins but no power to feul pump. feul and ingition relays are good have check them. no trouble code light on the ecm don't know what to do next please help


p.s this is not my first conversion and the donor car is a 91 2wd auto


as stated in earlier threads, always try to get the donor equip out of matching cars, example: auto/auto, 5sp/5sp, 4x4/4x4, etc. it doesnt matter too much but it helps A LOT. my 86 wagon had no probs with the 90 wagon SPFI that i installed. REMEMBER, GET ALL THE HARNESSES. engine, inner fender, COMPLETE dash harness. dont try to do the cut/rewire/fuses-here-and-there approach. if you get the complete harness you can plug everything in and be done with it. ive done two now. no probs with either of them. mine just doestn work with the cruise cause i dont think its all hooked up. heres my setup; car - 86 wagon/4x4/5sp/'89 turbo column w/cruise controls/'90 dash bezel and controls. SPFI donor car - 90 wagon/4x4/5sp/cruise/ac/trip comp. i converted the dash to the newer style so i did a little more converting. if you dont get the same harness the trans might not plug in like mine but that just tells you when youre in 4x4 pretty much so no biggie. also, dont forget to get the SFPI fuel pump, distributor and convert the fuel lines as stated in the SPFI tech write up. good luck.

#3 archemitis

archemitis

    guy smiley

  • Members
  • 3,554 posts
  • the big minnie

Posted 30 March 2005 - 01:29 AM

wiring the dash and everything is for suckers, all you need is the engine to computer part.
id think your missing a ground somwhere, or your not puting power to the positive post on the coil.

do you have the starter wire hooked up? the fuel pump wont turn on till it sees a signal from the starter, or sees the disty turning.

good luck, sounds like your reel close.

#4 84gl

84gl

    Eat, Live, Breath Subaru

  • Members
  • 291 posts
  • Southwest VA

Posted 30 March 2005 - 07:43 AM

yes i have the starter hooked up and on go i'll check the ground pins aging today I've got til next monday when my spring break is over i hope i can get i together by then i don't like driving the 80 sedan up and down my ant's rough driveway to collage or the 60 mile round trip thats 300 miles just to school and back each week adds up fast on a car with 70k on it

the conversion i done before was the whole wiring harness but my dad done most of it when i was gone to collage last year because of the wagon caught on fire and burnout must of the wiring under the dash while he was driving it if he was still live to help i would problely have it done now that i have been working on it for two weeks now so, thanks for any help you can give


ps i am the ecm and motor conversion only i am not doing the whole wiring harness in less i have to

#5 84gl

84gl

    Eat, Live, Breath Subaru

  • Members
  • 291 posts
  • Southwest VA

Posted 30 March 2005 - 08:12 AM

oh that may help i am try to use the fuseable links box on the donor wiring harness could that be my problem it dose not say any thing about this in the conversion manual and all i stipped off the harness was the lights and fuse box could that be my problem

#6 archemitis

archemitis

    guy smiley

  • Members
  • 3,554 posts
  • the big minnie

Posted 30 March 2005 - 02:37 PM

also, make sure your using the correct relays. theres two kinds of relays in these subarus. one that gives power when it gets power, and another kind that stops power when the relay gets power.

i use the first kind only

#7 85Sub4WD

85Sub4WD

    EA82 Junkie

  • Members
  • 1,244 posts
  • Raleigh NC/Charlotte NC

Posted 02 April 2005 - 12:38 AM

oh that may help i am try to use the fuseable links box on the donor wiring harness could that be my problem it dose not say any thing about this in the conversion manual and all i stipped off the harness was the lights and fuse box could that be my problem

That's how I did mine - getting ONLY the computer part - taking it all is the easy and less adventurous way out - be sure you have a good connection from the starter, a good crank angle sensor, and a good computer - the ECM MUST ABSOLUTELY be grounded VERY well too - I mean the body (loosten a screw on the ECM case and wrap bare wire around it, tighten and connect the other end to the negative post on the battery) - if it is off an auto, consiter the safety interlock switch too

Here's a link you may find useful:

http://www.finleyweb...ault.asp?id=142

it has part of the FSM for a 1989 soob - including the part about troubleshooting the SPFI system

#8 breaffyaviation

breaffyaviation

    USMB is life!

  • Members
  • 145 posts
  • chicago

Posted 02 April 2005 - 01:43 AM

Did you change your fuel pump? The carbd fuel pump is no good for SpFI .
Jude

#9 gunslinger

gunslinger

    USMB is life!

  • Members
  • 167 posts
  • Gold Bar

Posted 05 April 2005 - 04:41 PM

wiring the dash and everything is for suckers, all you need is the engine to computer part.
id think your missing a ground somwhere, or your not puting power to the positive post on the coil.

do you have the starter wire hooked up? the fuel pump wont turn on till it sees a signal from the starter, or sees the disty turning.

good luck, sounds like your reel close.


suckers, huh? who's the cocky s**t? if im a sucker, then where does that leave 84GL? mine runs and drives great, he's SOL. figure it out for youself. see you in the water.




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users