GO FISHING, use SLABSAUCE Fishing Attractant
Results 1 to 2 of 2

Thread: M50 Engine rpm control with air-cond compressor ON

  1. #1
    Join Date
    Feb 2005
    Location
    Penang, Malaysia
    Posts
    243

    Default M50 Engine rpm control with air-cond compressor ON

    folks, i drive a non-vanos m50 e34 with air-cond in tropical malaysia. it is a manual car.

    here's my problem:
    1. with air-cond switch OFF, the engine rpm control is very smooth across the range including idle and drops quickly nicely when i take the foot off the accelerator.

    2. with air-cond switched ON, the engine rpm takes a while (~0.5 - ~1s) to drop once i take my foot off the accelerator. also idle speed takes a while to settle down and sometimes swings to 1000rpm.

    my question is:
    1. how does the ecu controls rpm speed (idle etc) when the air-cond is ON?
    2. what sensors/vacuum pipes etc are related to engine rpm control when air-cond compressor is ON?

  2. #2
    Join Date
    Feb 2005
    Location
    Penang, Malaysia
    Posts
    243

    Default

    does anyone knows what i'm asking or talking here

    Quote Originally Posted by ktteoh
    folks, i drive a non-vanos m50 e34 with air-cond in tropical malaysia. it is a manual car.

    here's my problem:
    1. with air-cond switch OFF, the engine rpm control is very smooth across the range including idle and drops quickly nicely when i take the foot off the accelerator.

    2. with air-cond switched ON, the engine rpm takes a while (~0.5 - ~1s) to drop once i take my foot off the accelerator. also idle speed takes a while to settle down and sometimes swings to 1000rpm.

    my question is:
    1. how does the ecu controls rpm speed (idle etc) when the air-cond is ON?
    2. what sensors/vacuum pipes etc are related to engine rpm control when air-cond compressor is ON?

Similar Threads

  1. air cond funny buggers
    By stx133 in forum 5 Series BMW
    Replies: 15
    Last Post: 12-14-2008, 10:24 PM
  2. E34: WOT throttle kickdown switch/air-cond mod
    By ktteoh in forum 5 Series BMW
    Replies: 1
    Last Post: 07-31-2007, 08:01 AM
  3. Replies: 5
    Last Post: 07-30-2007, 08:39 PM
  4. broken air cond.
    By Unregistered in forum 5 Series BMW
    Replies: 4
    Last Post: 04-06-2004, 01:22 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •