Mt 1999 concorde lxi shuts down and after 1 to 4 seconds restarts

Evaporative emissions system

https://www.google.com/search?q=2002+chrysler+concorde+lxi+evap+system+schematic

Fuel System diagrams

https://www.google.com/search?q=2002+chrysler+concorde+lxi+fuel+system+schematic

Vacuum lines

https://www.google.com/search?q=2002+chrysler+concorde+lxi+vacuum+lines+schematic

Service Manuals

https://www.google.com/search?q=2002+chrysler+concorde+lxi+Service+Manual

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all shown here

https://www.justanswer.com/chrysler/5klbd-chrysler-concorde-lxi-2004-chrysler-concorde-lxi.html

https://www.google.com/search?q=2000+Chrysler+Concorde+LXI+crankshaft+sensor+location

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The oil drain plug is located on the side of the oil pan, passenger side. It does not look like a typical drain plug, as it's one of those quick drain type. It is meant to be hand loosened and tightened. DO NOT OVER TIGHTEN or you are in for a world of hurt. Just firmly finger tight

Most likely blower motor resistor is bad &/or pigtail that attaches to it is corroded or broken.

#1 coil is on #1 cylinder. should be on drivers side, first coil at the front of the engine. another easy way to tell which is #1 is to look at the coilson both front sides. the coil that is farthest forward toward the front of the car is #1. Don

Remove the whole assembly. To do this remove the two bolts that hold it in from the top. They have 7mm heads.

When it dies and wont restart, check what is missing-- spark or fuel

There is a faulty sensor or valve. Sounds like a valve. The best thing to do, is take it somewhere that can diagnose the trouble code. Autozone can I believe, and they can tell you exactly what's going on with it.

That is a code for an invalid skim key. If you have another skim key try it. If it does the same thing then the skim module may be bad.

Hope this helps