My car won't start when it's hot outside

Asked by Jun 04, 2017 at 01:13 AM about the 1999 Toyota Avalon 4 Dr XLS Sedan

Question type: Maintenance & Repair

Okay something weird going on at night
my car start fine, but in the morning or
evening with the first drive of the day if it's
hot outside it will not start! And seems like
when I open the windows and wait a bit it'll
start then... What is broke ? ( It'll turn on
but not start it don't click and a jump won't
work ... If that help any )

1 Answer

31,345

So you are saying if the interior is hot, it won't start (no crank, not even a click), but if you roll down a window and cool the interior down it does start? First, check you don't have the anti-theft system activated when this occurs. If you have any aftermarket items that interact with the anti-theft, like remote start, heat may be affecting wiring where those systems were spliced in. Second, heat may be soaking the starter or causing a intermittent component failure in the starting circuit. To isolate that it would need troubleshooting. (A bench test of the starter would confirm its operation.)

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