I have a 1999 Chrysler Concord that after running 10 minuets dies and will not start for a few minutes even though the starter turns over the engine well. Where do i look for defective part? 150,000 miles.
Where do i look for defective part?
You perform diagnostic procedures to locate the problem. The troubleshooting section of the FAQ is a good place to start.
Also, in the future please use the title line of your topic for a short description of your car problem, not the full details of your question which belong in the body of your post. Thank you. (Title edited.)

I should additionally mention that the behavior you're experiencing is classic crank sensor failure. Frequently they will fail when they heat up and start working again after they cool down. However do not just blindly replace the part since there are many other things that can cause starting problems. Test to see if you're getting crank sensor output when the problem occurs.