Chevota,

I promise; no abusive language. Hopefully we are too civilized for that here. That being said, you keep saying you put EFI on your car. I don't know how you can do that. It is all built in. Are you talking about installing one of the last American holdouts to keep from joining the rest of the world? Are you talking about Throttle Body Injection? I don't consider that fuel injection. A cheaper version of that is used all the time in shops to move cars around with a dead fuel pump. You get an apprentice to sit on the radiator support and continually spray carb cleaner down the air horn. A true fuel inj system be it CIS or EFI is built into the engine. You mentioned Toyota. Have you ever looked inside the plennum chamber of a late model Lexus V/8. There is another small throttle blade for each cyl. Man, do those cars scoot.

The lambda system has circuits built in too take wide open throttle into account. The engines don't necessarily operate in open loop unless you have a sluggish oxygen sensor. When you punch it to pass, extra fuel is supplied to compensate for the big hole you created in the intake manifold with the wide open throttle. You are not running rich at this point because you are supplying air also. The mixture should be close enough to that stoic thing that lambda can send a signal to trim the fuel for optimum power. I am not an engineer so don't hold me to exact details. This is just my basic understanding of how the systems work in general.:p

Peter

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