LS motor shuts off when warm or when revved high, no check engine though?
Anyone have any ideas?

 

first thing I would do is borrow an ecu and test it, if that fails i would check vacuum and fuel pressure.

 

Does it cold idle okay?

 

I've tried the ecu, i have an extra, same thing if i keep below mid-temp it acts normally, but anything after the car will shut off and/or have trouble turning back on, or turn on and immidiately back off it does this when mid-temp or after a high rev, after revving down it'll bog down then die or almost die out, i mean im getting fuel and ignition but something dying out i'll try the vaccum and fuel pressure test, but if either was off what would it be?