My car doesn't like to start when it really hot outside. can everyone help me with this problem.

Check the main relay under the dash drivers side. you can fix it yourself by resoldering the relays to the circuit board. This is a classic symptom.

question mpumas?? I though the main relay just unplugs....why do you nee dto resolder the relays toteh circuit board?? I too have the same problem....

The relay module unplugs from the wiring harness. The main relay module consists of 2 relays, the relay for the fuel pump and the relay for the ECU. They are held together on a circuit board which the wiring harness plugs into.

So it unplugs....how does it plug it self in After the interior cools down???

I don't think mpumas meant that the relay unplugs ITSELF --- just that YOU can unplug it to fix it!!

OK....then we are back to my original question. How does resoldering fix the problem?

Resoldering fixes a bad/broken solder connection. Seems that component expansion during hot weather causes the connection to open.

Maybe I can clarify (arrogance - I haven't even ever SEEN the main relay!!)
If I understand correctly, there's this printed circuit board with 2 relays soldered to it - ECU and fuel pump. Also on the PC board, there is a multi-pin connector. So when people talk about "plugging in a new main relay" they mean "plugging in a relay assembly"

What my expert colleagues are saying is that the soldered joints between one (both?) of the relays and the PC board crack. Taking out (unplugging) the assembly and resoldering the joints, then plugging it back in again (sometimes) fixes the problem.

Right?

You explained it better then I.