My new car doesn't even have spark plug wires. It's "coil on plug", one less thing to replace cheaply and one more thing likely to go wrong. It's also got a "drive by wire" throttle, that didn't work so fantastically originally. Because the throttlebody wasn't grounded very well, it would be slow to respond after you get off the gas ex: when shifting. It compares the voltage signal from the throttle to "ground", and determines how open the TB should be. Adding a 10gauge wire connecting the TB to the negative post of the battery fixed this. Progress I tell you, sometimes seems awfully backwards... however I will say all this electronic gadgetry sure helps in the gas mileage!
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