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Old 02-06-2022, 12:54 PM
X5chemist X5chemist is offline
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Join Date: Jun 2021
Location: Austin, TX
Posts: 2,170
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Borrow a fuel tester from a parts store. Or buy one from Harbor Freight. Check fuel pressure first.

How many miles are on it? How old are the plugs? Upgrading to a single prong plug over a stock prong has improved engine idle and running on my 3.0i.
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'06 X5 3.0i - bought @143,123 miles (12/26/20)
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