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Thread: HVAC Problem

  1. #1
    Join Date
    Dec 2002
    Location
    Long Island, NY
    Posts
    9,703

    HVAC Problem

    Had the seals changed on the EATC all air comes through the defroster vents.
    Thanks
    John
    2003 Marauder 300B,
    6468 out of 7839 - Thanks Brian
    Heated Seats
    35% Tint
    Mercury All Weather Mats
    Trunk Organizer - Thanks MartyO
    Sold 4/3/2009 Now resides in AL.
    1961 Pontiac Bonneville Convertible
    1973 Oldsmobile Toronado
    2012 Kia Sedona van
    2016 Chev Silverado Pick Up 4X4
    2008 Corvette Convertible
    2003 Marauder 300 A Thanks Larry O 6/14/17
    2017 Prius Prime Advanced
    Member # 440
    ----- John

  2. #2
    Join Date
    May 2009
    Location
    Moreau Island
    Posts
    11,783
    Do the eatc self diagnostic test.

    https://www.youtube.com/watch?v=wSLjb8xh7Eg

  3. #3
    Join Date
    Jan 2004
    Location
    Somewhere in the N.C. Triangle
    Age
    64
    Posts
    25,965
    Unless the o-rings were not done correctly you have a vacuum leak.

    Places to look:

    Every vacuum line under the hood, especially the vacuum tree behind the intake on the firewall.
    The vacuum tank, square plastic box on the left side inner fender cover.
    Check all the vacuum lines under the dash going to the various motors and the EATC.

    BTW... the EATC self test won't detect a vacuum leak condition.

    Check here for the common problems with the HVAC system

    https://www.mercurymarauder.net/foru...-HVAC-PROBLEMS

    Can I ask who did the o-rings for you? You can reply with a PM......
    “When you can’t make them see the light, make them feel the heat.”
    Ronald Regan

    "The only way to deal with the Islamic State - these blood thirsty, blood-drunken, terrorists -
    is to kill them, keep on killing them, until you kill the last one, then you kill his pet goat."

    Lt. Colonel Ralph Peters

    “Be polite, be professional, but have a plan to kill everybody you meet.”
    "I come in peace. I didn't bring artillery. But I'm pleading with you, with tears in my eyes, if you **** with me, I'll kill you all"
    General James Mattis




  4. #4
    Join Date
    Nov 2014
    Location
    KC
    Age
    45
    Posts
    3,330
    ok, car ruuning check the vacuum box on the drivers side fenderwell, you should have 14 inches of vacuum... This should reallllly suck down your finger when the car is running. If it barely has any vacuum there, then i would check the vacuum tree under the wiper cowl, or check vacuum leading to the tree...
    I have had 2 cars recently that had plenty of vacuum to the black box on the drivers fender, but barely any vacuum leading to the HVAC. The hose that goes thru the firewall, directly above the gas pedal is the black hose that feeds the HVAC unit. BOTH cars had the hose cut inside the grommet that passes thru the firewall. This will resolve your issue.
    The twins2.3 whipple/aluminatorVortech V-2 lots of goodies

    04 DTR totaled, might make into a station wagon Here is how bad it was https://youtu.be/REUxjP1BVpg

    04 Silver Birch Dark Charcoal Hardtop Whipple
    04 Silver Birch Dark Charcoal Hardtop V2
    04 Silver Birch Light Flint To Dark Charcoal Converted
    03 DD Blue / Light Flint
    03 Blue / Dark Charcoal #232
    03 Silver Birch Light Flint <--- Cannot kill it.
    03 Black 300a

    04 Heaton Swapped DTR
    Joe's Wrecked DTR rebuild thread

  5. #5
    Join Date
    Dec 2002
    Location
    Long Island, NY
    Posts
    9,703
    What do those codes mean?
    2003 Marauder 300B,
    6468 out of 7839 - Thanks Brian
    Heated Seats
    35% Tint
    Mercury All Weather Mats
    Trunk Organizer - Thanks MartyO
    Sold 4/3/2009 Now resides in AL.
    1961 Pontiac Bonneville Convertible
    1973 Oldsmobile Toronado
    2012 Kia Sedona van
    2016 Chev Silverado Pick Up 4X4
    2008 Corvette Convertible
    2003 Marauder 300 A Thanks Larry O 6/14/17
    2017 Prius Prime Advanced
    Member # 440
    ----- John

  6. #6
    Join Date
    Nov 2014
    Location
    KC
    Age
    45
    Posts
    3,330
    You forgot to post the codes.
    The twins2.3 whipple/aluminatorVortech V-2 lots of goodies

    04 DTR totaled, might make into a station wagon Here is how bad it was https://youtu.be/REUxjP1BVpg

    04 Silver Birch Dark Charcoal Hardtop Whipple
    04 Silver Birch Dark Charcoal Hardtop V2
    04 Silver Birch Light Flint To Dark Charcoal Converted
    03 DD Blue / Light Flint
    03 Blue / Dark Charcoal #232
    03 Silver Birch Light Flint <--- Cannot kill it.
    03 Black 300a

    04 Heaton Swapped DTR
    Joe's Wrecked DTR rebuild thread

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