Description
3.1 / 3100 / 3400 Carb Conversion Harness
Want to run your GM 3.1, 3100, or 3400 engine with a carburetor while still keeping full electronic timing control? This harness makes it simple.
The 3.1 / 3100 / 3400 Carb Harness allows you to remove the factory EFI system and run a carburetor while the ignition system continues to operate with electronically controlled timing, similar to a stand-alone distributor setup.
Simple, reliable, and perfect for demolition derby cars, mud trucks, race cars, and off-road builds where you want the benefits of electronic timing without the complexity of EFI.
What This Harness Does
✔ Allows carburetor conversion on GM 3.1 / 3100 / 3400 V6 engines
✔ Retains full electronic timing control
✔ Operates similar to a distributor-style ignition system
✔ Eliminates unnecessary sensors and factory wiring
✔ Clean, simplified plug-and-play style installation
Why You’ll Love It
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Simple installation – no complex wiring required
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Reliable ignition control – consistent spark and timing
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Cleaner engine bay – removes unnecessary EFI wiring
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Perfect for race and derby applications
Compatibility
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GM 3.1 / 3100 / 3400 V6 engines
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Carbureted setups only
Required:
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1998–2005 tuned ECM
Optional Add-Ons
If you plan to relocate the coil packs, we also offer an Extended Crank Sensor Harness to make mounting and routing easier.
Important
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Off-road / competition use only
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Not intended for emissions-controlled or street-driven vehicles
