Holley dbw question [Archive]

08-17-2017, 01:45 PM

Do all the Holley gurus,

I'm using the part number 550-623(24x setup for truck dbw). I want to change over the throttle body to a vette 90mm dbw unit. Does Holley use a different wiring harness for the gas pedal and throttle body? If they do, does anyone know the part number for the correct harness i need?

Thank you.

andrewb70

08-17-2017, 03:06 PM

This will do...

https://www.holley.com/products/fuel_systems/fuel_injection/dominator_efi/harnesses/parts/558-406

Presumably you have a Dominator ECU...

Andrew

08-17-2017, 07:31 PM

That should be it. Thank you.

The Holley tech told me all the connectors are the same... he didn't believe that gm made a 8 and 6 pin connector for the throttle body.

andrewb70

08-18-2017, 05:27 AM

That should be it. Thank you.

The Holley tech told me all the connectors are the same... he didn't believe that gm made a 8 and 6 pin connector for the throttle body.

Holley tech isn't optimal for EFI support. To their defense, Holley doesn't sell a DBW harness for the older, 3 bolt TBs separately. It can be bought as part of a Terminator kit, which is how you have yours, I assume.

Andrew