It could be a lot of things. My first thougt was vacuum leak. I would suggest you look in to that first. Then consider a new fuel filter if you have not changed yours recently.

Hope this gives you a starting point.

Also, welcome to the Fest

Steve

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Steve

Calypso Red 1992 525i with 170K miles

1991 735i - Sold
1992 525i - Sold
1995 325is - Sold
2000 528i - Sold