Engine/transmission

2001 PONTIAC GRAND AM
156,000 MILES • 3.4L • V6 • FWD • AUTOMATIC
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DON COLEMAN
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Engine Boggs down when given gas, only goes about 40mph, doesn't want to change gears, makes a loud whistling sound after running a fee min. Has no power, takes forever to change gears, only gets up to about 40 mph. I have checked trans fluid, & replaced fuel filter.still acts the same
Feb 6, 2016 at 4:39 PM
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WRENCHTECH
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I would check for a restricted Catalytic Converter. You can do a pressure test at the 0/2 sensor hole.
Feb 7, 2016 at 5:35 AM