removing intake manifold for ECT replacement. '94 940

Discussion in 'Volvo 940' started by roland, Apr 23, 2006.

  1. roland

    roland Guest

    Hi everyone this is my first post here. Its good to find a wealth of
    knowledge and expertise on these great cars. Thanks in advance.

    I've recently dumped the codes on my 1994 940 and it looks like the
    cause of my rough idle is a faulty ECT (engine coolant temp) sensor. I
    plan on removing the intake manifold to better access the ECT sensor. I
    dont need to entirely remove the intake, just move it back away from
    the block a few inches. Question is, is it possible to leave everything
    (fuel rails, injectors, throttle body, etc) on the intake manifold
    while I do this? Thanks again.

    Roland
     
    roland, Apr 23, 2006
    #1
    1. Advertisements

  2. roland

    Glenn Klein Guest

    roland wrote:
    > Hi everyone this is my first post here. Its good to find a wealth of
    > knowledge and expertise on these great cars. Thanks in advance.
    >
    > I've recently dumped the codes on my 1994 940 and it looks like the
    > cause of my rough idle is a faulty ECT (engine coolant temp) sensor. I
    > plan on removing the intake manifold to better access the ECT sensor. I
    > dont need to entirely remove the intake, just move it back away from
    > the block a few inches. Question is, is it possible to leave everything
    > (fuel rails, injectors, throttle body, etc) on the intake manifold
    > while I do this? Thanks again.
    >
    > Roland
    >

    There is no need to remove the intake manifold to extract the ect sensor
    just disconnect the connector release the pressure in the cooling system
    then remove the sensor you will lose some coolant
    Glenn

    --
    "*-344-*Never Forgotten"
    Is for the New York City Firemen who lost their lives on September 11,2001.
    The official count is 343, but there was also a volunteer who lost his life
    aiding in the initial rescue efforts. And I will never forget them as
    long as I live,
    nor should any American.
     
    Glenn Klein, Apr 23, 2006
    #2
    1. Advertisements

  3. roland

    roland Guest

    The ECT sensor is under intake manifold runner #3. I couldn't imagine
    trying to get to it without pulling up the intake manifold. Again, this
    is for a '94 940. Also there are two temperature sensors under the
    intake manifold. The first, which is for the in-dash temp gauge, is
    under the first manifold runner so it is very easy to get to. Perhaps
    you're thinking of this one. The second, which is the one I'm trying to
    get to, is a sensor for the ECU, and is unreachable by any tool or any
    hand I've ever seen. Thank for the response though. I should have been
    more clear in my original post.
     
    roland, Apr 23, 2006
    #3
  4. roland

    User Guest

    In article <>,
    says...
    > The ECT sensor is under intake manifold runner #3. I couldn't imagine
    > trying to get to it without pulling up the intake manifold. Again, this
    > is for a '94 940. Also there are two temperature sensors under the
    > intake manifold. The first, which is for the in-dash temp gauge, is
    > under the first manifold runner so it is very easy to get to. Perhaps
    > you're thinking of this one. The second, which is the one I'm trying to
    > get to, is a sensor for the ECU, and is unreachable by any tool or any
    > hand I've ever seen. Thank for the response though. I should have been
    > more clear in my original post.
    >
    >

    Just pull off the intake air hose and the throttle housing. If you file
    or cut the corners off the old sensor you can fit a craftsman 19mm deep
    socket over the sensor. Add a six inch wobble extension, then a swivel,
    then a 14-18" extension. Lock the whole mess with your left hand and
    unscrew the sensor from near the brake master cylinder reservoir. If the
    coolant isn't hot you can snake the new sensor and washer back into
    position with your fingers. Use a small stubby flat blade screwdriver in
    the plug to gently start the sensor into the threads, switching to
    fingers at the first sign of resistance. If you filed away the corners
    on the new sensor you can use the socket method to get it tight.
    Otherwise there isn't very much room to tighten it up with a wrench,
    even with the manifold completely out of the eay.

    Bob
    --
    The goal when driving is to miss the maximum number of objects.
     
    User, Apr 24, 2006
    #4
  5. roland

    Guest

    1. Advertisements

Want to reply to this thread or ask your own question?

It takes just 2 minutes to sign up (and it's free!). Just click the sign up button to choose a username and then you can ask your own questions on the forum.
Similar Threads
  1. Antek

    93 960 intake manifold gasket

    Antek, Dec 7, 2003, in forum: Volvo 960
    Replies:
    1
    Views:
    648
    volvowrench
    Dec 7, 2003
  2. jyj

    decoder för volvo sc805

    jyj, Jul 19, 2004, in forum: General Motoring
    Replies:
    3
    Views:
    416
    El Mecky
    Jul 20, 2004
  3. TomR
    Replies:
    8
    Views:
    962
  4. Reinstalling intake manifold

    , Jul 8, 2006, in forum: General Motoring
    Replies:
    4
    Views:
    356
    James Sweet
    Jul 9, 2006
  5. ninja85

    For Sale 940 Turbo SE Left Over Spare Parts ECU, Relays, ect

    ninja85, Feb 22, 2015, in forum: Volvo Parts For Sale / Trade
    Replies:
    2
    Views:
    279
    ninja85
    May 6, 2015
Loading...

Share This Page