My mistubishi eclipse GT 2001 strts up just fine but after 10 min. or just after it starts to warm uf it looses its ability to idle. if uit ildles down to below 1500 rpm. it will just die. (stops running) I used a scanner to get the trouble code, but I don't have the number on my manual. P1603

ossible get a manual from reliable-store to fix it urself
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Clean the inside of the throttle body as best you can. also the idle air control motor.

Overheating could be thermostat stuck close,check coolant level.could be plug fuel filter,air filter[20000km].

The mentioned problem could refer to 2 things, O2 sensor or "clogged" injection system.
If the car changes the RPM dinamically then it would be O2 sensor, often stalls. Regarding clogged injection, preliminary try to rev to higher RPM, if that is the problem fast you will see the difference (maybe solves the problem, maybe will require cleaning.

It sounds like you got a short circuit somewhere, you can try replacing the fuses and see if it happens again.

have a 97 crown vic,
in warm weather it idles fine and run fine
now that its cold I have to hold at high idle to have warm up
for about 10 mins.
if I just start it the engine will die with out me holding on foot on the gas

SCAN IT CHECK.FOR A FAULTY FUEL PUMP OR RELAY.

The long warm up suggests the thermostat has failed and is stuck open. The hard cold start is commonly caused by a faulty coolant temp sensor or the wiring connector on it. The idle surging can often be fixed by disassembling the throttle body and cleaning out the carbon build up. Be aware that the throttle body idle control box also has some internal gears that strip, also causing surge.

your idle speed too low.take it to a dealer.they have to reset idle.it should be 600-800 rpms.when you turn on air conditioner.the computer steps up idling to keep engine from stalling .your curb idle too low.

sound like idle speed control problems.its idling too low.