resistors in wires to in tank fuel pump?

Discussion in 'General Motoring' started by Charles Marshall, May 20, 2004.

  1. 1990 740GL with the Regina single pump fuel injection system. Developed
    intermitent problems with the fuel pump not running and when I pulled the
    pump found that the positive wire had gotten hot enough to burn through the
    shrink wrap that is installed over the resistor which is soldered to the
    pump. I've never seen a setup like this before and wondered if anyone else
    had seen this. I'm thinking maybe some shade-tree wannabe put these
    resistors on here thinking it would improve the mileage (no happening). I'm
    including a link to a picture of it on geocities (apologies for the ads,
    can't pay for the premium page there). If you've seen this before or if you
    know if these resistors are supposed to be there, please respond.
    Thanks
    http://www.geocities.com//P5190992.jpg
     
    Charles Marshall, May 20, 2004
    #1
  2. Charles Marshall

    David Taylor Guest

    1990 740GL with the Regina single pump fuel injection system. Developed
    Have you measured that with a meter? I was just wondering if it's a
    choke and not a resistor?

    David.
     
    David Taylor, May 20, 2004
    #2
  3. Charles Marshall

    Asbjørn Guest

    I do not know this system, but that looks more like electronic noise
    suppressor coil to me.
    That is thick copper wire wound on a ferrite core, and has no significant DC
    resistance.
    The overheating may be due to a short cirquit (to the "ground") in the pump,
    or even more likely to a damaged wire at the connection.

    Asbjørn
     
    Asbjørn, May 20, 2004
    #3
  4. You're right, it's a choke. I soldered the wire to the pump terminal and
    put it back together, but still no go. Gonna have to replace the pump I
    reckon.
     
    Charles Marshall, May 20, 2004
    #4
  5. You're right about it being a noise filter. I put soldered the wire to the
    pump and put it back together and still no go so apparantly the pump has
    gone out.
     
    Charles Marshall, May 20, 2004
    #5
  6. Charles Marshall

    Mike F Guest

    Well, since you've got the pump in your hand, what happens if you apply
    12V directly to it? Those chokes are only to keep electrical noise (for
    the radio) to a minimum. (Running the pump dry will kill it, but it
    won't hurt for a couple of seconds.)

    --
    Mike F.
    Thornhill (near Toronto), Ont.

    NOTE: new address!!
    Replace tt with t (twice!) and remove parentheses to email me directly.
    (But I check the newsgroup more often than this email address.)
     
    Mike F, May 21, 2004
    #6
  7. Thanks for the help guys, I replaced the pump and I'm back on the road.

    Later
     
    Charles Marshall, May 21, 2004
    #7
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