740 GLE 1985 2.3 Vaccuum piping.

Discussion in 'Volvo 740' started by taff, May 25, 2004.

  1. taff

    taff Guest

    The engine misfires at low revs, but, put the throttle down and she
    flies. A previous owner has messed about with the piping around the
    carb and some pipes are blocked off with no indication of where they
    originally were connected. I can find no information in the Haynes
    manual relating to the piping.
    Can anyone suggest a website where I might find this information,
    preferably in a graphic format. I have looked on
    http://www.brickboard.com/ but can find nothing there.
    Thanks in advance.

    Taff........



    www.sounds-pa.com | www.thecomputerworkshop.com
     
    taff, May 25, 2004
    #1
  2. Hello

    I had this problem a while back, and did manage to find a diagram on the
    net, unfornately I can't find it again, but you're in luck, coz, I've since
    since bought a carburettor manual, I've scanned what I think will be the
    correct diagram, and put it on my webserver, you should find it here,
    http://82.1.64.66/Pierburg_2b7.htm (apologies if the download speed is slow,
    I've only got part of a slow internet connection) if reconnecting the vac
    pipes correctly doesn't solve your problem, you might need to check and see
    whether the same previous keeper messed around with the idle speed/mixture
    settings, and check for air leaks.
    On mine, the emulsion tubes near where the PCV pipe enters the air intake,
    tend to crud up every now and then, this could also be a cause of your
    problem.

    TTFN, Ken Phillips
     
    Ken Phillips \(UK\), May 25, 2004
    #2
  3. taff

    taff Guest

    Thanks a lot. Next problem is that I now have no excuse, I have to go
    and get my hands dirty.
    I will let you know if this solves the problems.

    Taff..........




    www.sounds-pa.com | www.thecomputerworkshop.com
     
    taff, May 25, 2004
    #3
  4. taff

    taff Guest

    Well it helped, but it seems that the main problem was a leaking head
    gasket between 2 and 3 cylinders. Sold the car for spares and bought
    a '92 940 estate from ebay instead.
    Taff.......




    www.sounds-pa.com | www.thecomputerworkshop.com
     
    taff, Jun 5, 2004
    #4
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