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Thread: Engine Harness and Starter Issues

  1. #16
    The Diagram Dude pcb's Avatar

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    Quote Originally Posted by naguilar View Post
    I saw in the thread that the trans has to be disassembled to add the speedo gear. I would rather use the right harness to avoid any CELs.

    I'm hoping it's just that...and not any type of engine/electrical issue.
    Why are you worried about the speedo gear ???
    If you've got ABS the ECU uses the wheel speed sensor input.

  2. #17
    Registered Member naguilar's Avatar

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    I was considering the effects if we may need to use a non-ABS harness and ECU.


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  3. #18
    The Diagram Dude pcb's Avatar

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    Quote Originally Posted by naguilar View Post
    I'm hoping it's just that...and not any type of engine/electrical issue.
    The shitty part is, that if you can't start your car you can't get any codes to help diagnose your problem....

    It would throw a crank sensor code if it had the run time to do it...

    I'm really thinkin, get the proper harness to start...

  4. #19
    The Diagram Dude pcb's Avatar

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    Quote Originally Posted by naguilar View Post
    I was considering the effects if we may need to use a non-ABS harness and ECU
    Don't consider those effects...
    Get the right harness and you won't need the speedo gear... Or the ECU

    PS... Check for spark while your cranking... The ECU may have killed your spark....
    Last edited by pcb; 04-30-2017 at 10:16 PM.

  5. #20
    Registered Member naguilar's Avatar

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    I'll report back with an update later this week. I believe we have spark but I am not entirely sure yet.


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  6. #21
    Registered Member naguilar's Avatar

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    Engine Harness and Starter Issues

    Update as promised. Got the new harness in today. Connector matched to power dash. But still the same issue. Got it cranked by running through fuse box and car started running erratic.

    It was in gear and started accelerating on its own. Fortunately it was on jack stands and with the ebrake. At this point it's definitely an electrical issue.



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  7. #22
    The Diagram Dude pcb's Avatar

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    Sounds like your on the right track.
    With the car running, your ECU may be able to throw you some codes to help you.
    With the wheels in the air and in gear your car may have gotten confused. The ECU uses the wheel speed sensor info and two wheels weren't spinning.
    (my ABS light went off once when I did that... drove 30 feet to clear it)

    Remember it revs to about 2000 RPM on a cold start.

    Try to trace your wires from the ignition switch and through your clutch switch (interlock switch) the B/L and B/Y wires.
    Both of those switches have been known to go bad.

  8. #23
    Registered Member naguilar's Avatar

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    I'm leaning toward that or the TR switch mis adjustment, but it's only a hypothesis.

    It revved to 2k. I will have to find someone with electrical experience to help sort this out.


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  9. #24
    The Diagram Dude pcb's Avatar

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    OK duh... I thought you had a 5 speed.
    You definitely want to check your TR switch...










  10. #25
    Registered Member naguilar's Avatar

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    Would I need to have the ECU reprogrammed or flashed for this issue?


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  11. #26
    The Diagram Dude pcb's Avatar

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    No... You're fine that way.
    Flashing is just for performance.

    Your TR switch may just be out of alignment preventing the car from starting.
    It's just an on off switch that verifies that the car is either in P or N then allows the starter to engage.
    The ECU still wants to know what gear it's in for other reasons but the starter circuit is quite simple.

    It sounds like your car is running... Your ECU will need some time to learn but it sounds like you're almost there.

  12. #27
    The Diagram Dude pcb's Avatar

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    Sometimes if the TR switch is a bit out of alignment, you can push of pull the shifter a little bit forward or back then the switch aligns and the starter will engage.
    I remember one guy could start his car in N but not P (or vice versa ?) when his switch was misaligned.
    Last edited by pcb; 05-05-2017 at 01:13 AM.

  13. #28
    Registered Member naguilar's Avatar

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    I have the nonsport shifter and tried starting it in N but still same issue.


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  14. #29
    The Diagram Dude pcb's Avatar

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    It could be out of alignment enough that neither positions line up properly, or you may have a broken wire/bad connection between the switch and the starter motor.

  15. #30
    The Diagram Dude pcb's Avatar

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    It looks like there is two separate switches for both the P and N positions.
    The H terminal looks like the one that feeds to the starter.
    The other ones are for the ECU so it can switch gears and stuff.


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