old yellow won't start

[ronnieb]

Engine is a 2002 5.3L from a Tahoe transplanted into my '84.

Harness and computer were modified by Hanna and Jesse.

Ok here is what's happening or not. Tried to start it and it just chuggs. Thought it might be the injectors so it got all new ones, no change.
Pulled the coil pack connector on driver side and started, no change.
Pulled the plugs at this point and discovered that there was only 2 firing on the pass side.
Tested the coil packs and they are all good.
Checked the compression and all are 170-180.
Fuel pressure is 53lbs.
I don't have a code reader that covers this year model which would probably help for troubleshooting.

This engine is also a TBW and doen't appear to be responding.

Anyone, everyone, please help, I'm stumped.