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ditto with my Ford Escape. I'm cursed...CURSED mind you...with too much power.
I disagree that you have to seal the valves. If you just turn off the injectors, the cylinders would pump cold air. Pumping losses remain the same. It would not be as good as closing the valves, but better than status quo. The problem is whether or not pumping cold air will quench the catalytic converter. Both my V-6's fire alternatively front to back. So making them three cylinders involves killing the cylinders on the front bank. I have a scheme that would divert the exhausted cold air from the dead bank to a small muffler so the cat would only get fed from the hot cylinders.
Right now, I have a surplus car because my daughter is away at school. Who's going to be sacrificed?
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