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Alien, in case you're still lurking out there, i have one more question.
If there was some sort of benefit to merely shutting off an injector, why hasn't it been done? I mean we're talking about a free mpg improvement, right? A few lines of ECU code and viola, an improvement in mileage!!!
Actually, there is such a system, or was, anyway, with the caddy V-8 a few years back. It was called limp home mode where it did what you are proposing, shut off fuel to half the cylinders in the event of a cooling system malfunction, essentially turning it into an aircooled engine.
I suspect there is some data out there on mpg numbers running in this mode. I bet they suck.
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