Turbo Engine rebuild 20HC85

[Juanmacandel]

In the photo you can see two hoses: a thicker one, which is the supply line, and a thinner one, which is the return line. I swapped them, making the smaller one the supply and the larger one the return. It improved slightly, but I still have some overpressure and the carburetor is overflowing. Any ideas? Is it possible that the pump has too much flow

[Jeff Turbo]

Plumbing the fuel in the wrong way round will not cure your issue I'm afraid. You could try welding a pipe into the fuel filler pipe as per DR Diesel if it's working correctly in a canister. But I would test under load first. You could route the return pipe into a fuel canister in the boot securely and drive it up the road and see how that goes. Your issue may also keep going back to to the wrong ECU on the car though.