1987 740 GLE -- Vacuum Canister Shot -- can I improvise?

Discussion in 'Volvo 740' started by Jamie, Jun 8, 2006.

  1. Jamie

    Jamie Guest

    Symptom:
    Air coming out of A/C vents very weak.

    Diagnosis:
    I traced the vacuum line through the firewall and to the T fitting
    where it splits through the vacuum check valve and to the intake, and
    the other direction goes to the vacuum canister.
    tested it, then cut the ends and reassembled everything on the hoses.
    This is OK.

    I removed the vacuum hose from the T-fitting to the vacuum canister,
    checked to see no-body was watching and attached my "pulmonary pump" to
    the vacuum hose. (I blew into the hose).

    The air flowed freely -- something was shot. I looked and looked and
    could not locate the canister. Correction - I could not ACCESS the
    canister. So, at the T-fitting I sealed off the opening with electrical
    tape and tested the vents. Great air flow - it worked.

    So, now what can I do about the canister? Can I buy another one, mount
    it somewhere else and run a new line?

    Thanks!
     
    Jamie, Jun 8, 2006
    #1
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  2. Jamie

    Jamie Guest

    I had to unseal the end of the T-fitting that goes to the vacuum
    canister. It seemed to be choking the motor. When I unsealed the
    T-fitting, the motor aspirated better, but I lost my ventilation
    pressure for the A/C. I am guessing maybe a canister from AutoZone?
     
    Jamie, Jun 9, 2006
    #2
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  3. Jamie

    Jamie Guest

    Regarding the above, I have no idea how to access that bugger. I got
    under the car and it looked like I needed to remove the bumper on my
    740 to get to the canister.
     
    Jamie, Jun 9, 2006
    #3
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