2008 Vette LS3 E38 no start

[06TrailblazerSS]

Have stock 2008 Vette LS3 E38 with standalone harness built by novak in CJ7. No spark or injector pulse. Think it's in theftlock, but scanner data doesn't show it's active. Can perform injector balance test and ecm operates all injectors. I have confirm correct 12V inputs to ecm


read after vats & code remove.hpt

[Alvin]

Are there any codes active when you try to start it?

You did do a write entire when disabling vats?

I've had 2 setups not start because of a bad cam sensor that had no code. This is not normal for most but a GMT355 V8 and GMPP both wouldn't start until we found crossed cam sensor wires.

[blindsquirrel]

Is this an auto trans ECM OS with the TCM chopped off, or a manual trans OS that accidentally got the trans type changed to Auto?

[06TrailblazerSS]

Are there any codes active when you try to start it?

You did do a write entire when disabling vats?

I've had 2 setups not start because of a bad cam sensor that had no code. This is not normal for most but a GMT355 V8 and GMPP both wouldn't start until we found crossed cam sensor wires.

I did full write.
No codes currenty setting. I did have repin the APP sensor do having signal returns wires switched.
I'll check the cam sensor wires.

[06TrailblazerSS]

Is this an auto trans ECM OS with the TCM chopped off, or a manual trans OS that accidentally got the trans type changed to Auto?

I was manual trans. I have performance built 4L60E installed with GM performance TCM controler. I have not yet done the TCM program setup.

[06TrailblazerSS]

Are there any codes active when you try to start it?

You did do a write entire when disabling vats?

I've had 2 setups not start because of a bad cam sensor that had no code. This is not normal for most but a GMT355 V8 and GMPP both wouldn't start until we found crossed cam sensor wires.

You was right the cam sensor was wired worng. Also found the MAF sensor wired wrong. Both connectors was wired backwards.

Thanks everyone for help. Now got figure out none functioning cooling fan. I'd bet its wired wrong lol

[gtstorey]

Has anyone ever seen an aftermarket harness that didn't have something wrong?

[06TrailblazerSS]

Has anyone ever seen an aftermarket harness that didn't have something wrong?

Had speartech make harness for 66 chevelle that i swapped ls3/6speed auto that was perfect out of the box. They had few options for shift indicator, cruise control ( and switch for older gm column). Think they will become go to place for builds going forward.

[Alvin]

You was right the cam sensor was wired worng. Also found the MAF sensor wired wrong. Both connectors was wired backwards.

Thanks everyone for help. Now got figure out none functioning cooling fan. I'd bet its wired wrong lol

Awesome.. Odd that cam stuff can keep it from cranking.. that hasn't been normal but have seen it personally twice.