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Jr	08-17-2017 03:45 PM

Holley dbw question

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 05:06 PM

This will do...

https://www.holley.com/products/fuel.../parts/558-406

Presumably you have a Dominator ECU...

Andrew

Jr	08-17-2017 09:31 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 07:27 AM

Quote:

Originally Posted by Jr (Post 664208)

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

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