92 integra GS won't start when day is hot and car sits out in the sun. starts fine when it is cool, but trouble when it is hot. I'm thinking maybe sensors heat up or fuel system.

Please help! any ideas on why this strange behavior.

Things to consider: cooling fans not working, put in new fuel pump and main relay, put in new manifold gasket, changed radiator hoses

 

Does it crank or try to turn over? Or just doesn't do anything when you turn the key? Check the distributor rotor/cap and battery cables/connections.

You have to be more specific since this can be 5,230,230,030,859 different things.

 

I don't like starting off with a new member this way, but I have to mention this.

Airdynamic -
Do not open 4 separate threads simply to draw attention to your thread.

It's called spamming and it will not be tolerated it here for any reason.

If your problem is truly a matter of life-and-death, we have a search engine that has logged over 5 years worth of thread discussions. If no one is around to respond to your question, please use the search engine to see if it's been covered.

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And...Welcome to HAN.

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Now...about the hot start issue. If the fuel system has been taken care of, the next thing I'd check is ignition, starting with the spark plugs. How old are the plugs and are they in the correct heat range for your motor?