Thread: uneven idol
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Old 12-16-2001, 09:04 PM
3.5litermoose 3.5litermoose is offline
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uneven idol

My dads 635 csi has an uneven idol, dropping down to about 500 rpm, then jumping to about 1000. Once then engine warms up though it stays at 750. Ive been told it's probably the oxygen sensor from a friend that had the same problem with his bimmer, but not positive. Any ideas on how much one of these would cost, or on whether or not the oxygen sensor is the problem?
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