Question about 1991 Honda Civic

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1990 Honda Civic is not starting in heat above 80F, what do you think the problem is???

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  • r_seangallag Jun 23, 2009

    How would one remedy a vapor lock, because the starter is turning the engine over fine.



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It might be what happened to another guy. He put a YouTube Video up entitled 'Honda No Start? Possibly Main Relay' and it says that this can occur in hot weather. And, he shows how to fix it yourself, so it may be worth checking out:
Good Luck! -Shane

Posted on Sep 14, 2009

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If the motor turns over but will not catch, it could be that the fuel evaporates somewhere and make a vapour lock. If it only makes a clicking sound but doesn't turn over the solenoid on the starter is probably fried.

Posted on Jun 23, 2009

  • Jaco
    Jaco Jun 24, 2009

    For a vapor lock, you can try removing the fuel line just before it gets to the injectors - don't let the fuel spray the engine! Insert the end in a jar, turn the key until the fuel pump kicks in (it'll stop after about 2 seconds) then fuel should come out of the pipe. Do this about 4-6 times then the piping should be cleared. Reconnect the hose, try to start the car.

    By this procedure I assume you checked that the spark plugs get spark? If they don't it could be that the ignition module is cracked and in the heat it opens up enough to prevent starting. What happens if you sart the car in cold weather and drive it until it's above 80°F outside?


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Could be your distributor coil going bad, when is cold it work normal, then when it get hot it gets weak or some time it just quit. next time when you shut the engine down when its hot, get a spare spark plug and ground it to the car and turn the ignition over to see you get any sparks. you may get some see if its strong or weak sparks. also check if you getting fuel, i switch my fuel filter from steal casing to a see through plastic filter which allow me to see the pump working and the fuel flow correctly. I still have the original fuel pump which is 18year old unit.

Posted on Jun 27, 2009

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