Please help engine won't start (long)

[Brian]

Update:
I tried starting the engine in "clear flood" (gas
pedal to the floor) mode and the engine ran, but only
barely.  It wouldn't give me more than 1500 rpms no
matter how I worked the gas, and it stalls out if I
let the pedal more than 2/3 of the way up.  I checked
for ECU codes again, now I'm pulling a 34 (knock
sensor).  Is this really a knock sensor problem or am
does the ECU think it's a knock sensor problem because
I'm trying to run a motor that has too much fuel
dumping into it?
BK