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OK. If the battery was disconnected when the mechanic did the plugs and other stuff, does the computer (ECM?) pull a "return to defaults" trick? The last tank was actually better than my 28 mpg that I was used to. Only by a little, but better. This is what I had expected in the first place with new plugs and coil packs. Does the computer "re-learn" some sort of parameters after power is removed? Is this what I hear referred to as "fuel mapping"? Still going to have the alignment checked next week. In for a penny in for a pound.
Thanks for all the suggestions. I'll be back with some updates over the next few weeks.
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