go to any electronics store and buy an can of "cold spray". when the
car won't start when its hot, give the main relay a good spray of this
stuff. thats how i confirmed my main relay was bad.


On Thu, 26 Aug 2004 05:20:20 GMT, "Steve Hansen" <hansen@hotttt.com>
wrote:

>Just the main relay failing
>Steve
>"John" <john@nospam.net> wrote in message
>news:4112A6F2.12CB3981@nospam.net...
>> My friend's Honda civic won't start when it hot outside. He believes
>> the main relay is not closing (no clicking) when this happens. He
>> removed the relay and we checked it on the bench. It closes reliably
>> with 12 volts even after baking in the oven a while. The solder
>> connections look find but we retouched them anyway. He's putting it
>> back to see. I expect the problem will return and the relay seems
>> solid.
>>
>> When he has the problem, it seems that there isn't even a sputter.
>> Completely dead. If he lets it set a while it starts okay then. He
>> believes the main relay doesn't click and fuel pump doesn't do the usual
>> start up noise. I'd check for fuel pressure on the rail, but there
>> isn't any access port. Is there an easy way to check this?
>>
>> I've read elsewhere that the ignitor can be a problem. Someone else said
>> try a new reluctor. However the problem seems to relate to outside
>> temperature, not to under hood temperature. I was thinking a crank pos
>> sensor. We have no diagnostic tools to check these things.
>>
>> I guess I should also mention it is cranking nicely, just not starting
>> or even stuttering. If it starts, it runs just fine.
>>
>> He's worked the ignition key when this happens, so we don't think the
>> ign switch is bad.
>>
>> Are there any other common issues with this model that cause it to not
>> start when the cabin of the car is hot?
>>
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>