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  • 1990 ZR1 intermitant starter problems
  • 1990 ZR1 intermitant starter problems
  • 1990 ZR1 intermitant starter problems
  • 1990 ZR1 intermitant starter problems

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  1. #1
    Member korvettekarl's Avatar
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    Default 1990 ZR1 intermitant starter problems

    I have 1990 ZR1 with 58 K miles. Suddenly started to have a problem starting. Push starts every time. Relay? Starter? I don't want to pull the intake if I don't have to. Does anyone have any ideas where I should start? Any known issues. The car has ben great up to now. Any help is always appreciated.
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  2. #2
    Member LLC5's Avatar
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    Quote Originally Posted by korvettekarl View Post
    I have 1990 ZR1 with 58 K miles. Suddenly started to have a problem starting. Push starts every time. Relay? Starter? I don't want to pull the intake if I don't have to. Does anyone have any ideas where I should start? Any known issues. The car has ben great up to now. Any help is always appreciated.


    As with any electrical problem, have the battery properly load tested with a carbon pile load tester, battery cables clean and tight (no twisting), and ground cable to engine. Once these are proven good, further diagnosis can proceed if needed. Always start with the basics so you can trust any further diagnosis.
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  3. #3
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    Do you have the Factory Service Manual for a 90?
    If so, there is trouble shooting information in there you can use to determine if the problem is the starter relay, the starter or wiring.

    Also, on a 90, you might as well pull the plenum because there's a good chance the valley drain is plugged and the valley may be full of debris. And, you can tighten the bolts on the air oil separator that's in there, too.

    At one time I owned a '95 and I had all those problems at different times.

  4. #4
    Member korvettekarl's Avatar
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    Default Help

    Quote Originally Posted by LLC5 View Post
    As with any electrical problem, have the battery properly load tested with a carbon pile load tester, battery cables clean and tight (no twisting), and ground cable to engine. Once these are proven good, further diagnosis can proceed if needed. Always start with the basics so you can trust any further diagnosis.
    Thanks. The battery has been test as ell as all connections. I was just wondering if there were any known issues with the clutch neutral safety switch etc. I really don't want to pull the plenum if at all possible.I will start testing each leg of the starting system. Thanks for the reply, I really appreciate it.
    2017 Grand Sport Admiral Blue
    2014 Premier Edition Z51
    2010 Grand Sport
    1990 White ZR1
    1972 Nova SS
    67 RS Camaro
    66 El Camino
    55 2 Door Wagon

  5. #5
    Member korvettekarl's Avatar
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    Thanks Hib. Once again I had feeling you would answer. I actually gave this one to my step son. Good kid who deserves something good in his life. A hard worker and never asks for anything. If I pull the plenum I will make sure I follow your advice.
    2017 Grand Sport Admiral Blue
    2014 Premier Edition Z51
    2010 Grand Sport
    1990 White ZR1
    1972 Nova SS
    67 RS Camaro
    66 El Camino
    55 2 Door Wagon

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