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#1
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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??
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Kent |
#2
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There are 3 wires feeding the ECU that have to be hot...one constant, 2 switched....
Do you have all 3 hooked up?
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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" |
#3
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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.
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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 |
#4
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I had posted the pin graphs and Plug Identitfyers a little while ago..> That would help in a big way
Tom |
#5
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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
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Kent |
#6
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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.
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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 |
#7
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how is your starter wired from the key? is it stock (SVX) all the way?
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-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 ? |
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