Quote:
Originally Posted by DaanBMW
Quote:
Originally Posted by dstrickland
What kind of hesitation is it? Like a rumble almost like a misfire when you take off?
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imagine you step on the gas pedal to take off. you can imagine that what happens is the rpms go continually up until you feel the engine is revving so high that you should shift to 2nd. so basically the graph would be a continuously rising curve rpm = f(time).
mine would basically be a v. v. brief rpm rise, then a dip - a bog down, feels like a hesitation as it I suddenly took my foot off the gas but I didn't - after which the rpms finally continue the rise expected by the order via the gas pedal. so curve would be a Z shape: up - down - up again.
rumble ? not sure i'd call it that, it is a severe and short dip in rpms that if it would last would kill the engine (it never does).
misfire ? likely not, as a misfire would likely getting more pronounced at high loads/speeds, which never happen.
idling is steady, no dips, no chasing. |
Daan,
I'm having a similar experience in my 325i.
I finally received a code as the car went into limp mode. The code indicated a bad CRANKSHAFT POSITION SENSOR. I have the new part in hand and am going to swap out sometime this week.
I'll post back with acceleration hiccup results.