Vectra air flow sensor

Discussion in 'Vectra' started by Mad Mark, Jan 5, 2004.

  1. Mad Mark

    Mad Mark Guest

    A while ago someone posted a link to a web site that showed how to strip &
    clean the air flow sensor. Since changing my PC, I have lost this.

    Does anyone know the web site address?

    Many thanks indeed.

    Mad Mark, Jan 5, 2004
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  2. Possibly here:- Air control Valve.htm
    Patrick E. King, Jan 5, 2004
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  3. Mad Mark

    Mad Mark Guest

    Mad Mark, Jan 5, 2004
  4. Mad Mark

    Bob Smith Guest

    Thanks (both asker and answerer), I have been wanting to know how to DIY
    that. Mine needs cleaning out every 3 months.

    Another question though: Does anyone know how to get an "air breather mod"
    kit to stop itmessing the valve up to start with? Someone mentioned getting
    one under guarantee from VX about a year ago. I asked my regular garage to
    quiz VX about buying one (out of warranty), and VX say they have no idea
    what I am talking about! I am also wondering if it is a design flaw, and
    should be a free mod anyway.

    Bob Smith, Jan 7, 2004
  5. Sorry! Can't help you on that. Never heard of it either but I'm no expert.
    Patrick E. King, Jan 8, 2004
  6. Mad Mark

    Bilko130 Guest

    You need a breather modification which consists of the
    A gauze filter,
    2x Jubille clips.
    To fit,
    Open the bonnet of your car. You will see at the front of the
    engine on the right, Right angled, rubber breather pipe aprox 1" in
    diameter. You have to cut this pipe to fit the Gauze filter in line.
    Basically, cut out the bend of the pipe so you are left with 2 short
    straight pieces of pipe. Put the clips over the pipe and fit the
    filter to the pipes and tighten clips.
    It's easier to "visualise" if you have the parts in front of you
    to see how it all fits together.
    Go to your local Vx parts department and hand over about £15.00
    An easy job that shouldn't take more than 5 mins
    Bilko130, Jan 9, 2004
  7. Mad Mark

    Bob Smith Guest

    Thanks, sounds simple. VX didn't have a clue what my mechanic was talking
    about when he phoned them about it though.

    How often do you need to change the filter? (even if it is once a year, its
    better than the strip down job I would have to do to clean the valve)

    Bob Smith, Jan 9, 2004
  8. Mad Mark

    Bilko130 Guest

    Unless you had major problems with crankcase pressure it should
    not need changing. It's actually a seperator, It allows the oil vapour
    in the crankcase gases to be removed so it,s not drawn back into the
    intake and coats you idle air valve in crap.
    It does work... to a degree. You will find your IAC will still
    periodically require cleaning.
    Incidentally if your having problems with erratic idle speed,
    carry out the following.
    Clean the IAC valve with carburettor cleaner. Clean the throttle
    body and butterfly with carb cleaner.
    Look at your enigine from the front of the vehicle. At the back
    of the rocker cover you will see two pipes. One large (about 1") and a
    small one (about 1/4") With the engine running remove the smaller pipe
    and check for a vaccum. If no vaccum, the throttle body end is
    blocked. Remove the pipe from the throttle body and get a paper clip.
    Unfold the paper clip and sharpen one end. Insert the paper clip into
    the pipe aperature and unblock the hole. Put the pipe back on and make
    sure it's unblocked by blowing down it.
    If this fails, and you still have idle speed faults you may need
    a new IAC valve. Very expensive.
    Hope this helps
    Bilko130, Jan 10, 2004
  9. Mad Mark

    Bob Smith Guest

    Thanks for the info.

    I don't have a faulty valve, it works fine after it is cleaned out, but only
    for 2-3 months. I will get a breather mod, then clean it out myself (only
    costs £15 at my garage, but I am fed up of taking it in).

    Bob Smith, Jan 10, 2004
  10. It may sound too simple but check your throttle cable adjustment too.
    I found mine had been previously adjusted to compensate for the choked up
    idle valve.
    when I cleaned the valve I had a merry tickover of 2500.
    -- ikie
    Ikie Cabolacov, Jun 17, 2004
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