For the vast majority of materials, including the copper in the starter
solenoid, resistance increases with higher temperature. Higher
resistance means less current, assuming the voltage is the same. Thus if
your starter solenoid is marginal when cool, it may not work at all when
hot.

Red Cloud wrote:
>
> George Macdonald <fammacd=!SPAM^nothanks@tellurian.com> wrote in message news:<j05se09kh6qfjmjl14gfnh17s0f2krrhhe@4ax.com>. ..
> > On 8 Jul 2004 17:44:45 -0700, mmdir2002@yahoo.co.uk (Red Cloud) wrote:
> >
> > >I don't know if the original talk about main relay (89-91 civic/accord
> > >default) here gave a solution to my car starting up problem. They said
> > >it's main relay problem. I'm getting doubt it. I put another main
> > >relay when my car was not starting up right. Well I got the same
> > >result. I have had to wait 30 minutes to start up the car. There is a
> > >dead silence when trying to start up. The starting motor does not
> > >even turn over. It seems to be the problem lies in some kind of
> > >electrical contact that something is not contact right. Distributor???
> >
> > People said main relay based on your description. Unless I'm mistaken,
> > this is the first we've heard that the starter doesn't even turn the engine
> > over and that's likely nothing to do with the distributor. Check battery
> > cables and connections, especially the ground which (usually) goes under
> > the battery shelf and across, via a strap, to the transmission. Do you
> > hear a click from the starter solenoid when you turn the key to "Start"?
> > Have someone else turn the key and listen under the hood. Check the
> > voltage at the battery and the starter/solenoid when the key is turned to
> > Start.
> >
> > Rgds, George Macdonald
> >
> > "Just because they're paranoid doesn't mean you're not psychotic" - Who, me??
>
> Ok. I will check the battery and listen to the starter solenoid.
>
> yeah, George, I believe the problem on starter/solenoid. Let me ask
> this
> why my car has to cool before start the engine. If the car is hot,
> does not start right away. Do you know if hot engine is not good to
> activate the starter/solenoid right?