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  1. E46 General
    My e46 has had this problem where when it’s cold outside while warming up I can hear the secondary air pump work for bit then shut off. After that the car will stay around or above 1k, it will then dip almost to 0 and will go back up. After it’s warmed up it idles normally. Replaced plugs...
  2. E46 General
    Ok, I'm at a complete loss here. '01 325i m/t. Idle is bouncing coming to a stop (shift to N or clutch in). Drops down to about 500 or slightly under bounces back up to 900-1k and just continuously bounces the whole time unless I feather the gas a little and settle it at 700 myself. Sometimes it...
  3. E46 M3
    Symptom: car will appear to surge, fall off, surge, fall off, surge... when accelerating from a stop OR when decelerating for a turn followed by accelerating into an uphill corner. There is a consistent slight rpm hunt at idle when dead cold for maybe 30 seconds which then levels out. What...
  4. E46 General
    Hi all, I've had some problems with my 01 330ci with fairly high mileage and zero modifications. I have read all of the popular threads on this topic: My Issues: Intermittent Choppy and hesitant acceleration (normal driving) under 3k RPM's Intermittent poor/loopy idle Rare complete engine...
  5. E46 General
    Hi all, My '01 325iT has an stubborn idle surge. This happens primarily when slowing or coming to a stop after driving (like when sitting at a stop sign or light), and is especially noticeable when the AC is on. Engine idle oscillates between 400-1000, eventually settling into the nominal...
  6. E46 General
    Hey Guys, I've got a 2005 325i with 100k miles. Here are the symptoms of my mystery problem - calling all BMW doctors. symptom #1 - Usually occurs while cruising around 40mph - Drop in rpm (about 200-300) - Low pitch vibration, sounds like it from the rear, though its hard to tell - Surge in...
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