ls1 wont start
It will start on ether but after a revolution or two it kills spark it seems
Had the car been sitting, unused, for any length of time? If so, maybe the injectors are clogged.
Are you not getting any fuel?....or are the injectors really not "firing"?
Have the injectors actually been checked with a noid lamp, for pulsing?
If wires were moved, you may have broken the crank signal lead (yellow wire-1998...in the vicinity of the trans). This happened to me. I couldn't locate the break in the wire, so a bypass was run to the correct pin @ the ECM, and also to the crank sensor.
I can't recall if this signal is also responsible for spark. You mentioned that ether made the car run, briefly.
It will start on ether but after a revolution or two it kills spark it seems



