Engine Performance problem
1987 BMW 635 6 cyl Two Wheel Drive Manual 152000 miles
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Suddenly my 635 has an erratic idle and wants to stall when I try to accelerate. It is as though it's not getting fuel or air. What should I check first? Some posts say 02 sensor, some vacuum, and some say air flow meter ($$$); what do you think?

I am not fond of throwing parts at cars to fix them but you may need to replace a worn air flow meter to start with. Let us know if this works.