Results 1 to 4 of 4

Thread: Help with the ICV, pulling and cleaning

  1. #1
    Join Date
    Jan 2007
    Location
    Vancouver Island
    Posts
    25

    Default Help with the ICV, pulling and cleaning

    I've got a issue starting and idling, the car won't start very easily, needs a lot of gas, and then won't idle very well, wants to stall out. It runs fine once it's warmed up, or at least seems too, although the idle still seems low at around 500rpm. No engine check light, and no engine fault codes. From my readings and suggestions from this forum, I'm going to start by pulling the ICV and cleaning it (possibly replacing it, but at $115 cleaning would be a first choice, provided it works).

    Any help you all could give me in how to go about pulling the ICV and cleaning it would be appreciated. I've a diagram from the part website, but it being the weekend, I won't be able to get my hands on a Bentley manual for some weeks, certainly not before I take the car in for a tune up. I'm assuming the ICV is the part labeled #17 "L-Shaped Idle Regulating Valve".

    I'd like to narrow the issue, if not solve it before this coming Thursday, when I've got an appointment with a highly recommended but expensive mechanic.
    Attached Images Attached Images  
    Last edited by brendanm; 01-19-2007 at 07:37 PM.

  2. #2
    Join Date
    Jul 2006
    Location
    Minnesota
    Posts
    77

    Default Cleaning ICV is easy. Once you get it removed, just spray

    it with some carb cleaner from both ends. Look inside to see that it clean and you're good to go.
    However, before you finish, besure to check the continuity on your Throttle Position Sensor. At closed throttle you should get zero ohms between two of the connections on the TPS. If you are reading between 1 and 5 ohms, you will have problems like you described. I chased my idle problems on my M30engine for months before I noticed I had slight resistance in the switch. Basically, if you are getting 1-5 ohms, the computer does not know your throttle plate is shut and doesn't know what to do.
    Good luck.
    Jeff in MN
    87 535is 245k Recent top end re-work
    88 528e 290k
    90 535i 115k
    98 740i 115k New Magnaflow Cats, No More Codes

  3. #3
    Join Date
    Oct 2004
    Location
    Honolulu
    Posts
    3,105

    Default # 17 is it

    buy a can of throttle body cleaner, and spary the inside from both ends and see if the rotor moves as you clean it.

    for good luck, you can also clean the throttle body too.


    Vee ave vays of dealing vid your kind...........

  4. #4
    Join Date
    Jun 2004
    Location
    Perth, Australia
    Posts
    252

    Default

    Quote Originally Posted by Jeff in MN
    At closed throttle you should get zero ohms between two of the connections on the TPS. If you are reading between 1 and 5 ohms, you will have problems like you described. I chased my idle problems on my M30engine for months before I noticed I had slight resistance in the switch. Basically, if you are getting 1-5 ohms, the computer does not know your throttle plate is shut and doesn't know what to do.
    Good luck.
    i've just taken my AFM and ICV off to douse in carb cleaner, while i'm waiting for it to dry i tested my TPS... at idle with the ignition on A/C i get 2.5 ohms on posts 4 and 6, anything off idle gives me 0 ohms on 4 and 6 and 0 ohms on 4 and 5... even full throttle shows no resistance between 4 and 5... no voltage on anything, despite the bentley saying there should be voltage.?

    am i doing something wrong or is my TPS stuffed? i have a so-so idle at the moment, particularly when first starting the car, though the number 13 hose in the diagram above was very loose, hopefully there was a vacuum leak there
    Last edited by Randell; 01-21-2007 at 02:01 AM.

Similar Threads

  1. Pulling my engines
    By duby55 in forum 5 Series BMW
    Replies: 7
    Last Post: 02-02-2010, 07:20 PM
  2. engine cleaning - no steam cleaning!
    By shogun in forum 5 Series BMW
    Replies: 0
    Last Post: 03-09-2009, 08:23 AM
  3. the car is pulling a little right
    By paschalisg in forum Suspension & Steering
    Replies: 3
    Last Post: 03-13-2005, 07:29 AM
  4. the car is pulling a little right
    By paschalisg in forum 5 Series BMW
    Replies: 3
    Last Post: 03-13-2005, 07:29 AM
  5. Pulling the leaker
    By jsvizijr in forum 5 Series BMW
    Replies: 0
    Last Post: 03-16-2004, 09:56 PM

Posting Permissions

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