1973 Z28 Doesn't have fire.

Discussion in 'Troubleshooting & Diagnosis' started by Jhboy10, Nov 19, 2014.

  1. Jhboy10

    Jhboy10 New Member

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    Im trying to get a 1973 Z28 up and going again and it seems to not have spark. I have been told the motor is a 1968 350. Cleaned points and distributor cap and plugs. Turns over doesn't hit once. Set the points to 15/1000s and try again, nothing. Take out a plug and ground it to block, then turn it over and there is no spark. Finally took off coil and tested it in an ignition simulator and it works. Haven't been back to the car yet. Any tips??
     
  2. ls777z

    ls777z Veteran Member

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    Have you checked the coil and spark plug wires? If coil is good something is going on between there and the plugs. Battery fully charged up as well? Low voltage from there will affect spark.
     
  3. COPO

    COPO Veteran Member Lifetime Gold Member

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    Change the condenser. I've seen new ones that were dead.
     
  4. azkeebler

    azkeebler Veteran Member

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    You may need the yellow wire that usually runs from the "R" terminal of the starter to the + side of the coil to supply 12 volts for starting.

    Also, make sure you have the coil connected correctly, - to distributor, + 1 wire to ignition switch and to 1 wire to "R" terminal of starter.

    I assume you know that you check and adjust the point gap with the distributor bumped to the open position. (Some that are new to points ignition don't know,& hard to see/tell with the dizzy in the back of the motor)
     
  5. Jhboy10

    Jhboy10 New Member

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    Thanks im gonna go back and try different coil and plug wires, and ill check for the yellow wire. Also something I forgot to mention is that the car was stolen from the previous owner and the switch wont turn it over someone put a push button in the dash.
     
  6. ls777z

    ls777z Veteran Member

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    Time to wire it like it should be otherwise you might be continuously chasing electrical gremlins. :(
     
  7. stevenp3762

    stevenp3762 BANNED

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    Check the rotor cap too.
     
  8. 71flh

    71flh Veteran Member

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    So much changing of parts. So little measuring.
    One problem. Many plug wires. Change plug wires?
     
  9. Jhboy10

    Jhboy10 New Member

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    Tried again today and no luck. Test light to coil its getting power. Cleaned points again. Adjusted points. Cleaned inside of distributor cap. Tested condenser it works. Put on good coil wire and plug wire, grounded plug to block still no spark. Unless the points are no good what else is there to check?
     
  10. stevenp3762

    stevenp3762 BANNED

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    rotor.
     

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