Hey guys i put engine trans tcase interior and all wiring harness in a 94 excab 4x4 long bed truck swapped everything. None of the harnesses have been altered everthing is hooked up but it wont start. Fuel pump works got spark. If i pour gas down throttlebody it starts but not just turning key. Its not the anti theft or the netral safty switch checked both. Im stumped. Clearly injectors not working but they worked fine when i drove the tahoe into my shop to start the project. Any ideas?

 

No injector pulse? On any of them? Have you checked for spark? I wouldn't think you have spark if injectors aren't pulsing, but that does not seem your case.

Have you checked your grounds on the rear of the engine? Those get missed all the time...

 

So i just found out there is an injector control module attatched to the coil mount. It provides a ground to the injector circit im getting ready to test this n see if thats my problem

 

Was VATS disabled on the computer?

I haven't met a swap vehicle that hasn't needed VATS removed for it to start.

 

Injector control module? Ignition control module?

I was going to mention that I "think" your engine is a 5.3 because you said 2006 Tahoe, but you stated 5.7 on the title and now you mentio this...what engine do you actually have? Does it have a distributor?

 

I was thinking the same thing