Transplanting a 5.3/60e

[creekrat]

Just finished transplanting a 2005 5.3/4l60e into my 93 regular cab short bed. Problem is it won't start. I pulled the fuel rails with injectors attache and used some leads to the battery to cycle the injectors and they spray just fine. Attached is my .tun file and a couple second log file from when i was cranking. I noticed that the only thing that changed in the log file is the o2 heater voltage.

Thank you in advance for any assistance

18683
18682

[creekrat]

So after some checking the injectors are not opening when cranking. I lifted the fuel rails/injectors and had a neighbor crank it and no fuel came out. I then attached 2 leads directly to the battery and disconnected the injector connectors and was able to make the injectors spray. At this point i am guessing it is a pulsed ground issue

[joecar]

Is VATS disabled.

Do you have CKP signal...? Does scantool show realtime RPM while cranking...?

PCM grounds injectors to fire them.

Check injector connections to PCM, and injector connections to power.

[creekrat]

After tracing all of my wiring i pinned it down to the switched 12volt that activated my main relay. I inadvertently used the 12volt switched to the radio which does not stay hot when cranking the engine. I relocated my relay activation wire to the a/c circuit (only sees 12v when the key is in the on or crank position) and it fired up. Thanks for the assistance Joecar