The Subaru SVX World Network   SVX Network Forums
Live Chat!
SVX or Subaru Links
Old Lockers
Photo Post
How-To Documents
Message Archive
SVX Shop Search
IRC users:

Go Back   The Subaru SVX World Network > SVX Main Forums > Technical Q & A
Register FAQ Community Calendar Today's Posts Search

Reply
 
Thread Tools Display Modes
  #1  
Old 03-13-2008, 10:59 PM
914helo 914helo is offline
Registered User
 
Join Date: Mar 2005
Location: Ridgecrest, CA
Posts: 146
Still can't start my 3.3L conversion

I am back at work on my Porsche 914 conversion, but am unable to start the engine. I verified that I have good fuel pressure going into the engine but do not have spark. I swapped igniter's but still no spark. I tried wiring a CEL to see if a crank or cam sensor was bad but it didn't seem to work. By checking the ECU pin the CEL is not getting any voltage. Is my ECU bad or maybe not turning on?
The ECU should be getting power; I've got a constant hot going to the ECU backup power supply wire and switched hots to the fuel pump and main relays. My fuel pump works fine, but maybe the main relay is not working?
I don't have much more to do after I finish this wiring and really want to drive my Porscharu. Any ideas??
__________________
Kent
Reply With Quote
  #2  
Old 03-14-2008, 05:21 AM
huck369's Avatar
huck369 huck369 is offline
Inventor of the 5-speed swap
 
Join Date: May 2001
Location: Somerset, KY
Posts: 5,605
Significant Technical Input Registered SVX
There are 3 wires feeding the ECU that have to be hot...one constant, 2 switched....

Do you have all 3 hooked up?
__________________
Huck
Subaru Ambassador
92 SVX LS-Tour Magnaflow Exhaust, 5-Spd-AWD
88 XT6 AWD 5-Speed "Bride of FrankenWedge"
15 Impreza Premium Sedan
15 Crosstrek XV 5-Speed
My 5-Speed "How-To" Write-up
1976 Pontiac Firebird Formula
Current Count of Subaru's Owned.... "70"
Reply With Quote
  #3  
Old 03-14-2008, 05:50 AM
b3lha's Avatar
b3lha b3lha is offline
Phil & Belha
 
Join Date: Aug 2001
Location: Alcyone Limited, Buckinghamshire UK
Posts: 2,671
You need to get the CEL working to find out what the ECU is complaining about.

I don't have the wiring diagram to hand at present. IIRC the CEL is supposed to be connected to power on one side and to the ECU pin on the other. The ECU connects that pin to ground when it wants the light to come on. So you won't ever see any voltage on that pin.

Don't take my word for it though, check the diagram.
__________________
Subaru ECU and TCU Website
1992 Alcyone SVX Version L
1992 Alcyone SVX Version L
1994 Alcyone SVX S40-II
2004 Subaru Legacy 2.5 SE Sports Tourer
1996 Subaru Legacy 2.2 GX Wagon
1988 Subaru Justy J12 SL-II
Reply With Quote
  #4  
Old 03-14-2008, 06:35 AM
TomsSVX's Avatar
TomsSVX TomsSVX is offline
Maniac modifier
 
Join Date: Dec 2003
Location: Branchburg, New Jersey
Posts: 15,490
Registered SVX Classic SVX
I had posted the pin graphs and Plug Identitfyers a little while ago..> That would help in a big way

Tom
Reply With Quote
  #5  
Old 03-14-2008, 07:28 AM
914helo 914helo is offline
Registered User
 
Join Date: Mar 2005
Location: Ridgecrest, CA
Posts: 146
I do have 1 constant hot and 2 switched hots feeding the ECU. I also have the pin diagrams printed out, but for the CEL pin it doesn't trace the wire leaving the ECU. Where does the CEL wire get its power? If I add a power supply to the CEL wire how does it ground itself when it's triggered? Thanks
__________________
Kent
Reply With Quote
  #6  
Old 03-14-2008, 07:47 AM
b3lha's Avatar
b3lha b3lha is offline
Phil & Belha
 
Join Date: Aug 2001
Location: Alcyone Limited, Buckinghamshire UK
Posts: 2,671
I've just checked the diagram and I was right.

Wire one side of the CEL to power and the other side to the ECU pin. The ECU will supply a ground to that wire when it wants to turn the CEL on.
__________________
Subaru ECU and TCU Website
1992 Alcyone SVX Version L
1992 Alcyone SVX Version L
1994 Alcyone SVX S40-II
2004 Subaru Legacy 2.5 SE Sports Tourer
1996 Subaru Legacy 2.2 GX Wagon
1988 Subaru Justy J12 SL-II
Reply With Quote
  #7  
Old 03-15-2008, 08:29 AM
Speedklix's Avatar
Speedklix Speedklix is offline
Locker Link Solution
 
Join Date: Aug 2002
Location: North Shore, MA
Posts: 1,902
how is your starter wired from the key? is it stock (SVX) all the way?
__________________
-Mike
ECUTune2v7 - 4.11 5 Speed - Sprung 6 Puck Clutch - D&S Rotors - SS Brake & Clutch Lines - HKS Panel Filter - HeaderBack Exhaust -80GB Hard Drive - GroupN Engine Mounts - - some other "tricks"
[SIGPIC][/SIGPIC]
In progess: track down mystery noise <-identified, paint the new dash, get better pic
Spring plans: Replace Trans - Integrate ECU with the carputer - Suspension - Go back to STI Filter - Paint? Maybe not - Next Oil change: Purolator L30165

Member #995 | My Locker | My New Locker

Catch you next at: ? Auto-X ?
Reply With Quote
Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -6. The time now is 07:25 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
© 2001-2015 SVX World Network
(208)-906-1122