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In Reply to: 635 Engine miss at speed?? posted by Nathan T. on November 15, 1999 at 22:59:55:
: I just experienced a wierd problem taking the car out this weekend. Driving along just fine when all of a sudden, a quick sputter as if all power was lost for an instant. Did not reoccur until tonite while accelerating in 2nd gear. A brief, BLAH!!, and then it kept on running. I did not notice any lights go out as I was driving in the night, just seemed to be ignition. Anyone have any thoughts???
: TIA
: Nathan
: '87 635csi
Hello Nathan,
Sounds very familiar. I would first look at oxegen sensor. The driver's handbook states that the sensor should be replaced ever 50,000 kilometers.It has been my experience that most people forget about the sensor; but more important is the true fact that a test of the sensor will not tell a full story. I have had a cut in performance while driving. Checked the sensor found it to be ok. Replaced the sensor anyway never had a problem since.If sensor has not been changed for a while, it can be a pain getting it out. Threads seized be paitent.
all the best Keith