Injector wiring order matter?

[Jessemas23]

Good evening, I have a 2007 tahoe that I have removed the manifold on… when I reinstalled the intake I noticed a couple of the injector wires on the passenger side are about the same length and am curious if order matters? Any input would be greatly appreciated, this thing is driving me nuts.

 

[mikez71]

should be timed to spray when intake valve is open..

 

[wjburken]

View attachment 420644

Yes, it does matter.

They fire in sequence with the spark plug and cam timing:

 

[Blackcar]

Here are the wire colors.

Your PCM pinout for the injectors is:
A3 = injector 1 Black wire
A4 = injector 4 Lt Blue/black wire
A5 = injector 6 Yellow/black wire
A6 = injector 7 Red/black wire
A19 = injector 2 Lt Green/black wire
A20 = injector 5 Pink/black wire
A21 = injector 3 Black/white wire
A22 = injector 8 Dark Blue/white wire

Injectors 1, 4, 6 and 7 are fused by INJ1 fuse
Injectors 2, 5, 3 and 8 are fused by INJ2 fuse

If for some odd reason you have a MFI instead of a SFI system the wiring would be:
D11 = injectors 1,3,5,7 Dark blue wire INJ 1 fuse
D10 = injectors 2,4,6,8 Dark green wire INJ 2 fuse

 

[Jessemas23]

Ok, thank you for the diagram. Do you have the drivers side too by chance? I want to double check to be sure. It’s running like crap

 

[Jessemas23]

Thanks

 

[mikez71]