99 Vortec 454 injector harness

[8T7K5]

I'm replacing a broken injector connector on my 99 big block and found what looks like corrosion on the wires, pretty sure that's not some kind of insulation. Assuming it's like that through the whole harness, especially given how old and brittle/stiff the wires feel, could that corrosion cause my misfires? I'll be replacing the harness as soon as I can find one.

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[Erik the Awful]

Yup. Replace that garbage! You may still have a problem, but if you don't fix things like along the way, you'll never get it running right.

 

[stutaeng]

That does look pretty crummy. Aren't the injector connectors part of the main harness? Maybe it's different on the 7.4. You may to go back to good copper wire, properly solder and heat shrink it.

Where has the truck lived? Maybe in a really moist environment that will happen?

 

[8T7K5]

That does look pretty crummy. Aren't the injector connectors part of the main harness? Maybe it's different on the 7.4. You may to go bad to good copper wire, properly solder and heat shrink it.

Where has the truck lived? Maybe in a really moist environment that will happen?

Truck came from north Louisiana, not really what I'd consider overly wet. Got a new harness on the way, $65 from GM.

 

[stutaeng]

Cool. Some dielectric grease on the connector is always good practice.