As Van914 suggests, suspect the MAF sensor.
My car had the same symptoms when the MAF started to **************** the bed.
Try unplugging it and driving it. The worst you’ll get is a CEL because the car doesn’t get a signal from the sensor which goes away once you plug it back in again.
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Six speed 2000 Boxster S
Arctic Silver on Metropol Blue | LN Dual Row IMSR | Arctic Silver console, spoiler frame & bumperettes | Crios mod | Technobrace | RoboTop module & modified convertible top relay for one-touch roof operation
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