02 mercury sables starts but within 6 minutes shuts completely down. Won't start for bout 15 minutes later then shuts down again.

It's gathering frost inside. When you turn it off & drive around for a short while, it defrosts & starts working again.

I'll bet when you park it, you find a pretty large pool of water under it half an hour later, don't you?

Sorry, that's the nature of the beast - it's worse in humid weather, not so bad in dry weather. Pretty nearly all cars (with AC) do that unless the AC is designed oversized.

You are right that it could be either component, or something else electrical. The security system will kill the fuel system if the wrong key is used or the system is acting up.
A mechanic would check base fuel pressure with a gauge and also see if the pump is getting power from the relay when it fails to start.

battory is bad it runs fine just altoter is runing so buy a battory and it should work fine

check and test fuel pump and relay

Hi
Your symptom shows sign towards Starter motor is sticking or tooth in the flywheel is broken.

Did you replace the fuel filter? don-ohio

sounds to me like you have a short in the ignition itself , it seems intermittent which would make me believe its the ignition

well its a ford product all I can say is get the trans rebuilt-its a common problem after 130kmsof running

hi check fuel pressure if it dies out after warming up then you have a faulty fuel pump good luck

sounds like a tipical crankshaft position sensor will fix your car