2001 Lincoln Town Car 4.6 engine frequently has a very loud bumble bee sounding noise with or without a/c, if it occurs at idle engine will surge and sometimes shut off, been doing this off and on for nearly a year. I removed serpentine belt and checked all pulleys, they are all free wheeling and no looseness, HELP
My car has 78000 miles.
My car has an automatic transmission.
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