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Thread: Z Still not starting

  1. #1
    Professional Zcar Nazi
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    Default Z Still not starting

    Hey guys, as some of you may know, i was taking my car out of my garage a little while ago and it just shut off, i could almost swear i saw some kind of white some come out of the hood vent or the cowl, and i could smell what i thought where wires or plastic burning. I replaced the fuel pump relay today, and still nothing. The problem is, the fuel pump is getting no power at all, when i hotwire the pump the car will flash, then die again. Sorry for making another thread about it guys, but i really need the car going again, seeing it sit there is really getting to me.
    Thanks alot, any help is greatly appreciated.
    P.S the relays should click when i go into the on position right? because there is no noise at all.
    1978 Datsun 280Z Black Pearl Edition (Bye Bye )
    1978 Datsun 280z White on Black Trim, 350SBC Swap Underway.

  2. #2
    Supporting Member EScanlon's Avatar
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    Default

    Fusible Links?

  3. #3
    Professional Zcar Nazi
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    tested them, sanded down the connectors, but i dont think thats the problem
    1978 Datsun 280Z Black Pearl Edition (Bye Bye )
    1978 Datsun 280z White on Black Trim, 350SBC Swap Underway.

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    Professional Zcar Nazi
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    Actually, at the on position and the start position one of the relays clicks, at the passenger side kick pannel, and it does it again if i take the wire on and off from the fusable link closer to the front of the car.
    1978 Datsun 280Z Black Pearl Edition (Bye Bye )
    1978 Datsun 280z White on Black Trim, 350SBC Swap Underway.

  5. #5
    CraZZZy about Z's DatsunZsRule's Avatar
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    Default

    "i could smell what i thought where wires or plastic burning"
    "when i hotwire the pump the car will flash, then die again"

    Sure sounds like an electrical issue to me. Must have been a short somewhere in the wiring which caused this. My opinion to you would be to go through all the electrical wiring and inspect it to find the damage and correct it. I know it's easier said than done because it can be like trying to find a needle in a hay stack. Hopefully you have a FSM. to help guide you.

    Best of luck. Hope you get her running again soon.
    Jared (1977 280Z - SOLD )

    "Any car can get you where you need to go. A special car gets you there with a smile on your face"

  6. #6
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    Major headway tonight, got the car started 3 times, ran fine, fuelpump was getting power, and all everyting was running OK (guage lights are still out for some reason) anyways, i got it to start when i accidentally hit the fan control switch (on off, speed control) and i heard some relays clicking. That got me exited, so i started the car and it game me a bit of a backfire, so i moved the fan control switches a bit more and hit the console a bit....fired up just fine after that. But on the third time it wouldnt flash any more, but here's the really odd thing, anytime i play around with the fan switchs or shove the console around i can hear relays clicking. So i think tomorrow i will open up that entire area and see what's going on.....im almost positive thats where the problem is.....maybe some loose connection or somthing. Opinions?
    1978 Datsun 280Z Black Pearl Edition (Bye Bye )
    1978 Datsun 280z White on Black Trim, 350SBC Swap Underway.

  7. #7
    Known Zitus carrier! hls30.com's Avatar
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    Sounds like major electrical issue,
    Take the disconnect the battery when you aren't right there-hate to have the relays working with noone around to put out the possable fire...
    Will
    A Z is beautiful from any angle, I just happen to prefer to view from the drivers' seat!

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    I disconnect the battery every time im away from it. I keep thinking in my mind there's somthing behind the fan controls that is getting bumped around, but how likley is that? is there any wiring going from the drivers side to the passenger side that could have anything to do with a fuel pump?
    1978 Datsun 280Z Black Pearl Edition (Bye Bye )
    1978 Datsun 280z White on Black Trim, 350SBC Swap Underway.

  9. #9
    CraZZZy about Z's DatsunZsRule's Avatar
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    Did you even read my response???? I think it's more than loose connections

    If you don't have a FSM for your Z then I'd highly recommend getting one. The Factory Service Manual is the one and only book for the Z when it comes to working on it. Don't wast your time looking at haynes or chiltons manuals for a good electrical diagram. Youll find them disappointing.

    When you were playing with the climate controls and trying to get the car to stay running, I hope you had a fire exstinguisher at hand
    Jared (1977 280Z - SOLD )

    "Any car can get you where you need to go. A special car gets you there with a smile on your face"

  10. #10
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    Sorry, i did just get a fsm for a 77, but today somthing kinda bad/good happened. I opened up my relay box for and moved my fuel pump relay, and it pulled a bit on the main enginebay harness..... then i heard that damn sizzling, and a huge burst of smoke blew into my face, coming right out of the main harness.....so its gotta be a short somwhere in there....at least i found the problem area.
    1978 Datsun 280Z Black Pearl Edition (Bye Bye )
    1978 Datsun 280z White on Black Trim, 350SBC Swap Underway.

  11. #11
    CraZZZy about Z's DatsunZsRule's Avatar
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    Yeah, just like I thought Keep that battery disconnected man. Your asking for a fire every time you connect those cables to the battery. I'd quit playing around with the electrical wiring with the battery CONNECTED. Your not only increasing the odds of causing an electrical fire and risking having your Z catch fire but your also putting YOURSELF at risk of injury. Go through and Inspect that whole harness and find the problem and get it corrected WITH THE BATTERY DISCONNECTED. from the way it sounds (sizzling and smoking) that engine room harness won't be repairable and will have to be filed in the trash.

    Again, good luck and be safe Congrats on purchasing your FSM. You'll be damn glad you have it.
    Jared (1977 280Z - SOLD )

    "Any car can get you where you need to go. A special car gets you there with a smile on your face"

  12. #12
    BennyZ
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    Do you have water leaking or moisture, efecting the relays?? (if your car is ouside)

    You could clean all the conections.

    I have major problems and plan to re wire
    3/73 HLS30-152338

    Triple Weber, 5 speed, 245/45 16 tires, custum fenders, role cage, the rest is in the works.

  13. #13
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    This comes at a bad time, because i have an sr20 for my car and we are changing out the entire harness and ecu of course, but i really wanted to finish the year with a running Z.
    1978 Datsun 280Z Black Pearl Edition (Bye Bye )
    1978 Datsun 280z White on Black Trim, 350SBC Swap Underway.

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