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Could be 02 sensor or were you opening throttle? (archive)
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Posted by Jon on October 14, 2001 at 21:56:12:

In Reply to: Rough idle ...backfired...now run smooth again?? posted by Vernon '95 525i on October 14, 2001 at 20:19:15:

Could be your 02 sensor..
I just had mine replaced.. also happened once while I opened the throttle valve while playing around under the hood..
Nothing to worry about between BMW engineering and this forum you are in good hands..
]JON[


Yesterday morning I crank the car and it ran terrible. It idled very rough and then eventually shut off. It did this 3-4 times then it backfired and began to run as smooth as ever. Although it is now running smooth again, I know something is wrong. Has anyone experienced this before. The car is always tuned. I always run 93 octane.

TIA, Vern




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