Suddenly last week my mom's 420 wouldn't start. It was diagnosed to have a faulty ignition coil. After replacing it, the car now idles at 2000rpms cold and 2400 warm. When the car is put in gear, it chirps the tires and idles at 1000-1200 rpms. I've had the vavle covers off and have tried to start it several times with gas, carb cleaner, etc. being put into the intake. I've let it idle and driven it about 5 miles since, and it still idles really high. I thought it may have been left over carb cleaner, but that would burn off instantly, right? Can someone please offer some insight into this problem?
Thanks
David

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2000 Honda Accord V6 137k miles

1972 300SEL 4.5 98k miles

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