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DISCUSSION => Engine + Driveline => Topic started by: redhead on February 14, 2007, 09:20:29 PM

Title: off idle stumble
Post by: redhead on February 14, 2007, 09:20:29 PM

Hi gang,

When I just blip the throttle a crack and then release it the engine stumbles for a split second. If I don't release the throttle the engine will rev up as normal. Any ideas wht this might be?

TIA,
Gene

Title: off idle stumble
Post by: Shocker on February 14, 2007, 09:58:42 PM

Could be your Idle Control Valve, try cleaning it.  Or could be a vacuum leak.

Title: off idle stumble
Post by: bmwman91 on February 15, 2007, 03:28:55 AM

This sounds pretty normal.  A lot of it has to do with the stock air flow meter.  It has a moving flapper door inside, and is subject to inertial forces.  Simply put, blipping the throttle gets it bouncing a little, and that confuses your ECU.  Long story short, it is pretty normal.