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Thread: Restoring a 2001 750iL that sat for 3 years

  1. #351
    Join Date
    Jul 2016
    Location
    Chicago, Illinois
    Posts
    2,590
    My Cars
    2002 540i\6, 1989 750iL
    DSC module acting up?
    Quote Originally Posted by WBAD530i View Post
    M62 is an uncontrolled substance, and when abused can cause severe side effects. Do your drugs in moderation kids.

  2. #352
    Join Date
    Feb 2014
    Location
    MA
    Posts
    294
    My Cars
    2000 750iL
    Quote Originally Posted by XAlt View Post
    DSC module acting up?
    I get the DSC precharge unit to power up with a 12 volts source, but won't get any power from the connectors. I am also getting vacuum at the vacuum line to the master cylinder.
    Prior to start working on the engine the system was working properly.

  3. #353
    Join Date
    Jul 2016
    Location
    Seattle, WA
    Posts
    46
    My Cars
    2004 R32, 2011 A4 Avant
    Seems like you're 90% of the way there. Get your hands on a wiring diagram, and trace back to where the pre-charge unit ties into a voltage source. There's either a break in the line, a relay is bad, or (most likely) there is a connector that wasn't hooked back up when the new engine was installed.


    Sent from my iPhone using Tapatalk

  4. #354
    Join Date
    Feb 2014
    Location
    MA
    Posts
    294
    My Cars
    2000 750iL
    Quote Originally Posted by KSEADUB View Post
    Seems like you're 90% of the way there. Get your hands on a wiring diagram, and trace back to where the pre-charge unit ties into a voltage source. There's either a break in the line, a relay is bad, or (most likely) there is a connector that wasn't hooked back up when the new engine was installed.


    Sent from my iPhone using Tapatalk
    Looked at the diagram and traced the wiring. I was also not having enough vacuum at the brake booster, so I end up connecting the vacuum line straight to the vacuum plug on the
    top of the intake and bypassed everything else. ( See picture)
    Brake pedal is good now. But hope it wont cause other issues.

    001.jpg

  5. #355
    Join Date
    Feb 2014
    Location
    MA
    Posts
    294
    My Cars
    2000 750iL
    Still fighting with the coolant temp. Gauge stays at 12 oclock, but I get high readings, it goes up to 114 C at times, then as low as 96 C.
    Heat now that hot. Not getting low coolant warning, but I may have to bleed it more. T Stat, and water pump are new.
    I hope that head gasket stop leak did not clog my heater core. I replaced the heater control valve with a used one.

  6. #356
    Join Date
    Jul 2016
    Location
    Chicago, Illinois
    Posts
    2,590
    My Cars
    2002 540i\6, 1989 750iL
    Quote Originally Posted by masu3701 View Post
    Still fighting with the coolant temp. Gauge stays at 12 oclock, but I get high readings, it goes up to 114 C at times, then as low as 96 C.
    Heat now that hot. Not getting low coolant warning, but I may have to bleed it more. T Stat, and water pump are new.
    I hope that head gasket stop leak did not clog my heater core. I replaced the heater control valve with a used one.
    114C isn't too bad. The MAP stat is by design erratic, but bleeding should help.

    You sure the used HCV was good?
    Quote Originally Posted by WBAD530i View Post
    M62 is an uncontrolled substance, and when abused can cause severe side effects. Do your drugs in moderation kids.

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