How to Convert EFI to Carburetor?
2 Answers
Before the conversion, prepare the ECU, fuel injection unit, oil-gas separator, throttle assembly, wiring harness, EFI-specific fuel level sensor, etc. Remove the fuel tank, carburetor, throttle cable, and thermal insulation joint, drain the fuel tank, and remove the fuel level sensor. Install the EFI system components, connect the wiring harness, and finally connect the ECU, leaving the oxygen sensor feedback line and diagnostic tool port for debugging.
I've been working on car modifications, and switching from fuel injection to a carburetor requires caution. The fuel injection system is complex, involving the Electronic Control Unit (ECU), which you need to remove first. Don't rush—prepare tools like wrenches, screwdrivers, and a multimeter. Then, find a compatible carburetor. There are specialized conversion kits available on the market, but don't cheap out and pick the wrong model. Check if the original intake pipe is compatible and modify its size if necessary. Next, disconnect the fuel injection-related wiring, including the fuel pump and sensors, and safely remove these components to avoid short circuits. When installing the carburetor, pay attention to sealing to prevent fuel leaks at the connections. Afterward, reconnect the fuel lines and air supply, and adjust the carburetor's mixture ratio—this step is crucial and usually requires manual tuning of the ignition system. Once done, test the idle and acceleration to ensure smooth operation. The whole process is technically demanding, and beginners can easily make mistakes, potentially leading to engine misfires or failure to start. It's advisable to practice on simulation software first or seek guidance from an experienced mechanic—safety comes first, so don't regret causing major issues later.
