Question about 1992 Honda Accord

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When it is hot outside my 1992 honda accord wont start.

My car will start great even on warm mornings but as soon as it sits in the sun for awhile it wont start. It turns over but will not go. Most times if I open the hood and let air circulate it will start. I have had it looked at numerous times to no avail. This has been going on for a few years.

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  • slimphilthe1
    slimphilthe1 Apr 26, 2009

    car wont start when sits in sun...but will if it is cool inside the car.

  • David Melrose May 11, 2010

    I would suggest checking for 1) a faulty engine coolant temp sensor (this sensor is separate for the engine computer---it is different from the coolant temp sender that sends temp information to your dash gauge), 2) a faulty engine intake air temp sensor, 3) a faulty fuel pressure modulator.4) a clogged air filter or intake passage.

    Also try this--when the car won't start hot--hold the gas pedal down all the way and try again. If the engine starts, it was getting too much fuel to start normally. This probably means the one of the sensors above is telling the engine computer that the engine is cold when it is really hot. This would cause the computer to schedule fuel for a cold engine--which is too much fuel for an engine that is already warm. If the engine won't start with full throttle while hot, then it might not be getting enough fuel when hot. I would suspect the fuel pressure modulator is faulty. check the fuel pressure when the engine is warm and compare to specs.

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Check the main relay under the driver side dash or your distributor mogule gets hot must be replace this should solve ur problem GOOD LUCK

Posted on Apr 25, 2009

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I would check the main relay, under the dash to the left of the steering column. There is black box with 7 wires in a brown connector, check for 12v at the Yellow wire, if no power replace the relay. It is very common complaint "when it get hot my car won't start"

Posted on Apr 25, 2009

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1 Answer

I just failed smog and the technician said that it was either the EGR valve or the catalytic converter that caused it to fail. at the same time when i let the car sit in the outdoors at work in the sun...


Have your main power relay replaced. It's what is causing your hard start, after the car is hot, especially sitting in the sun. It's located under the driver's side dash. As for the reason why you failed smog, could be the two you listed.

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No, the main relay isn't the problem. Most likely, the high temp made it a bit more difficult to start, then it sounds like it may have 'flooded' (too much fuel, since it had trouble starting right away). Letting it sit for awhile will solve a fuel flooding problem. Make sure the coolant level is where it should be, and car is not due for a tune up. Extreme heat or cold is tough on an engine, and a few small problems can prevent the car from starting in those conditions. How long has it been since plugs, plug wires, distributor cap, rotor, fuel and air filters have been replaced? Just make sure you keep up on the maintenance, and remember. the accord is getting on in years. How many miles? Good luck with the Honda, it's a great car (I have a 91 Prelude and a 92 Accord).

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