check resistance on injectors. make sure between 10-13ohm check spark plugs when was last tuneup? fuel filter etc. a clogged one could cause pump to overwork and whine. replace both 02 sensors, why not. soak in pb blaster before removal, cut wire coming directly out of 02 sensor put big socket on it to remove, if you use a box end wrench it will probably strip the 02 sensor nut. Then see how your car does.
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