Diffcult to clean a throttle body (87 740 Turbo)?

Discussion in 'Volvo 740' started by Mang0, Oct 4, 2004.

  1. Mang0

    Mang0 Guest

    For most intents I'm a newbie mechanic.
    I can do the basics (changing a tyre :p), oil, air filter, etc.

    I'm trying to improve the shape of this 87 740 Turbo I purchased a few
    weeks ago. It stalls when idling after a cold start if it's really cold.
    It it's just a little cold, it'll splutter and then the engine revs up
    to avoid the stall.
    If it's cold and put into gear, it will almost always stall unless my
    foot it touching the gas. And even then it's 50/50.

    Someone recommended I clean the throttle body, as this helps a great
    number of problems. As I've never done this before, I'm a little nervous
    :) I also read that the "idle valve" should be checked and cleaned.

    What I need to know, is where IS the throttle body on my 740 Turbo? :p
    I've found the throttle cable, and where it connects etc. Is the part
    where it goes into the engine called the "throttle body" ?
    The Haynes book (surprisingly) doesn't mention it.

    Also, I've seen people on this board recommend carb cleaner, but the FAQ
    on brickboard recommends Fuel Injector cleaner and explicitly says "NOT
    carb cleaner". Which should I use?
    Mang0, Oct 4, 2004
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  2. Mang0

    James Sweet Guest

    The throttle body is the metal butterfly valve bolted to the intake
    manifold, the air pipe from the intercooler connects directly to it through
    a formed rubber elbow, take that off and the throttle butterfly (rotated by
    the throttle cable) will be visible. It's much easier to clean if you remove
    the whole assembly, it's 3 bolts to the intake manifold, you do have to
    remove the throttle position sensor to get all the bolts out though and then
    you have to realign it so it clicks just as the throttle starts to open
    without it holding the throttle open, it's easier to do than it is to
    James Sweet, Oct 4, 2004
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  3. This should help:


    IPD USA specializes in Volvo parts. The link above is for a throttle
    body cleaning kit they sell and also at that link is a 3 page pdf file
    that you should be able view that describes the process of removing
    the throttle body, cleaning it and then reinstalling the throttle
    body. That piece of paper came in handy when I recently cleaned mine.
    I just noticed that you are outside the US so I can't say how much it
    would cost to get the kit shipped to you, but it would probably be
    cheaper for you to cobble up the kit locally anyway.

    Hope this helps!
    Da Camera Man, Oct 7, 2004
  4. Mang0

    Mang0 Guest

    Don't let me email address fool you :)

    Wow, only USD18, I was expecting at least 3 times that.
    I'm starting to like ipdusa quite a lot.
    The next thing from them will be the headliner kit.
    Mang0, Oct 7, 2004
  5. Mang0

    James Sweet Guest

    IPD is great for a lot of stuff, you can get the headliner kit for much less
    elsewhere though and you can get it in colors other than white. I paid about
    $50 for the cloth and adhesive to do mine.
    James Sweet, Oct 8, 2004
  6. Mang0

    blurp Guest

    I am just about to undertake this job myself and am curious about one
    thing. The IPD Site states:

    "Our latest kit outlines the step by step procedure on removal,
    cleaning and resetting of the throttle body on 1982 and newer LH
    jetronic cars."

    Although mine is a 1983 240 Turbo it uses K-Jetronic instead of
    LH-Jetronic injection. Is anything majorly different? Looking at their
    diagrams I see right away that I don't have the same Throttle Switch
    setup. What about the gasket? I called the dealer and their parts guy
    had no idea if it would be the same gasket for my car.

    blurp, Oct 12, 2004
  7. The throttle body is fairly common to all Volvos and just needs a thorough
    clean. You can use about half a can of carb cleaner to get it spotless. In
    the VOC we recommend that it be done every two years for maximum usefulness.

    Cheers, Peter.
    Peter K L Milnes, Oct 13, 2004
  8. Mang0

    James Sweet Guest

    Nothing is particularly different, the K-Jet turbos are actually easier when
    it comes to the throttle body. The non-turbo K-Jet is another story all
    together though.
    James Sweet, Oct 16, 2004
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