try running the engine with three cylinders and see how it goes. your idea isn't too far fetched but I think a better question you should ask yourself is, why does your vehicle get such poor mileage in the first place?
Yes, I'll give it a go and see. I just wanted to see if there where any major reasons why I shouldn't - I dont want to wreck my engine.
The milage I get is typical for the car. There's nothing wrong with it. I just can't afford the fuel to use it as a daily commuter - especially with the silly prices for petrol here in the UK - about ?6GBP a gallon - madness.
Yes, I heard about that from a friend. However, if I could switch the injectors circuitry onto a dummy load (with the same resistance as the injectors) then the ECU wouldn't "know" the injectors were off. Wouldn't be that hard to rig up..
The major gains of shutting off cylinders don't come until you can shut off more than just the fuel injection. You also need to be able to shut off the valves. That's how modern displacement-on-demand systems are able to increase efficiency.
If you really want to get better fuel economy from your Alfa, there may be other options. How is it geared? An Alfa owner on another forum, with a 1974 GTV, has extremely short gears...
Honda has a V6 where 3 cylinders are shut off (VCM: Variable Cylinder management). But it's more complicated than just stop the injection. It's a combination where the V-tec system closes the valves of the shut down cylinders.
As said here before, because of the lambdasensor the ECU would definitely notice the fuel cut off. But maybe you have two lambdasensors? For each cylinderbank? But even than, your ECU will only generate troublecodes because it's unable to compensate.