well to give you an example(non DSM anyway) in my neon at one point it wouldnt start, it ended up being my fuel pump, it would draw too much current and keep blowing fuel pump fuses, after hardwiring it temporarily it started up and ran fine...for awhile, eventually my fuel pump went out completely on it though, but once a clogged fuel filter gave me a similar problem to yours back a few years ago when I had a 91 laser NT, also for another example, my current SRT swapped neon just today gave me a problem it would start then immediately cutout, I had just hard wired my tach(since I use a standalone and no longer have a tach signal coming from the stock computer) anyway, i still had(until today anyway) my stock computer plugged in, I would try to start it and it would immediatley die...I was like WTF? then I finally realized...my stock computer was reading my stand alone computer's crank signal and trying to take control of my engine...and of course one engine cant obey 2 computers at once...once I removed the stock computer completely it ran fine again, or another possible scenario...it could simply be a short in the wiring leading from your crank sensor to the computer...once some wiring laying against my EGR pipe burned through and caused an intermittent short which kept causing my ignition engine feed fuse to blow...causing my motor to shut off....too many things it could be, some of them time consuming to find, and yes Dario, I know what crankwalk is, but just because I have a 7 bolt motor(which I actually do for the talon) doesnt mean I am automatically going to assume that its the cause