Jump to content

rfruth

Hybrid Member
  • Posts

    120
  • Joined

  • Last visited

  • Days Won

    1

Posts posted by rfruth

  1. Those of us who tow CMax's and Hybrid Fusions behind motorhomes have discovered that the brake system vacuum pump is always live regardless of key position.  So with everything off, if the vacuum leaks down, the pump will fire up and pump down the vacuum in the reservoir.  

     

    This is, I believe, what runs down the 12V battery in 3 hours or less when we tow.  Every Time our auxiliary brake systems apply the brakes, it uses vacuum and then the pump has to run.  This is a big pump, the fuse is 40 amp!  This is also why your 12V battery will run down if you let the car set a few weeks.  It even warns you in the owner's manual to put it on a charger if you're going to leave it set for a few weeks.

     

    You can hear it fire up when you first open the driver's door to get in.  It almost always does this unless you have recently driven it.  As these cars get older and the vacuum system gets leakier we can expect the battery to run down more often as the pump has to run more.

     

    This could be one of the dumbest design flaws on this car.  I cannot imagine why it's designed this way.  Pump should be hooked up to the accessory circuit so it only runs when the ignition is on.

    Did this 'feature' get added to the 2013 Fusion hybrids (my 2010 fires up its pump when I turn the key to run (just opening the door(s) won't do it ((not doubting you, just curious))

  2. Could it just be your (everybody) is in EV mode more these days (cause it's warm/hot) and you can here the radiator fan when its running full tilt boogie (like when the A/C is on) plus the compressor makes a clicking noise when the (compressor) clutch does its thing ((stick your head under a friends gas only car & have them cycle the A/C on & off, your gonna hear lots of strange noises)) this is not to say there isn't a problem but you may be hearing noises you've not heard before that are normal. 

  3. One of the risks is the big rigs can clear stuff on the roadway 4 wheelers may not be able to (tire caucuses etc.) - if you want to draft see if its okay with the trucker first (at a rest stop or use a CB radio) some don't want someone on their tail, if okay see if the'll change lanes or flash their lights to alert you of something unusual is about to happen.  

×
×
  • Create New...