If the engine won't turn over, clean the battery cables. If it will turnover but not start, findout if it needs fire or fuel to run then go from there.
it would be easier to answer if one knew what was meant
Had same problem in my 2000 contour. The problem was with a bad wire on my fuel pump. Every time i turned a sharp corner car would stall. I replaced fuel pump and no probs since.
It could be your EGR valve.
About a zillion things, one would be a bad fuel pump. If it will jump start and drive a few miles then die again replace your alternator.
There would be a spark plug loose n it wiggled and it got back into place and started back up
got the same exact problem.
your crank angle sensor playing up.
Again a lens cleaner will work.
If i were you i would start with the catyletic converter ,it'll start cold,start for a minute then stall, start back up but wont drive ,idle, but not drive ,check it out.
should start up no problem as long as battery is in good condition.
The first thing I would check is your crankshaft position sensor
The word contour does not exactly have an antonym, however, it you use contoured, the antonym would be flat.