Trouble starting after engine is hot

Discussion in 'General Tech' started by Austinx56, Oct 5, 2019.

  1. Austinx56

    Austinx56 Well-Known Member

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    So it fires up cold fine but sometimes takes like 7 seconds with the key turned to fire up?
    Replaced plugs wires, new dizzy, new starter, replaced coolant temp sensor, thermostat... car sits a lot.


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  2. ttocs

    ttocs Legend

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    any way to check fuel pressure?
     
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  3. Austinx56

    Austinx56 Well-Known Member

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    Oh should have mentioned I upgraded the injectors


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  4. Austinx56

    Austinx56 Well-Known Member

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    Yeah I had a leaking injector and it would be hard to start, had to give it some gas but now it seems
    Something electrical


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  5. ttocs

    ttocs Legend

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    upgraded like you had 19 lb and now have 24? Or just replaced/upgraded? If you switched the lb rating on the injectors did you get a tune or at the least a weighted maf?
     
  6. Austinx56

    Austinx56 Well-Known Member

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    Yes 24 and tuned and all
    It fires up in half a second cold, but still giving me trouble hot... maybe tfi module?


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  7. ttocs

    ttocs Legend

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    it could be any number of things from the fuel pump getting hot and not supplying as much to the standard dizzy/tfi issues. I was having exactly the opposite problem and figured it out to be the voltage was dipping JUST below the threshold it needed to be at to start and it took a while to find/figure out. Still not sure I have it fixed really....
     
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  8. BigBore96

    BigBore96 Active Member

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    Try a better ground wire by the battery that bolts to the core support up top by the radiator on the drivers side.

    So many hot start problems are linked to this little wire that gets old, corroded, and overlooked.
     
    Last edited: Oct 17, 2019
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  9. Austinx56

    Austinx56 Well-Known Member

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    This will be my next try thank you


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  10. najay

    najay New Member

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    There are starting injector values (multipliers) that need to be changed when installing larger injectors. I had the same issue when i put 60lb injectors in.
     
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  11. ttocs

    ttocs Legend

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    next time its hot, try turning the key on 2 times and waiting 6 secs to let the fuel pump prime. It could be getting hot and then not supplying enough fuel or pressure for a number of reasons.
     
  12. Austinx56

    Austinx56 Well-Known Member

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    Thanks brother I haven’t had a chance to try all these Solutions yet but will definitely try this also!
    Thanks again man happy holidays!


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