1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

Fuel Pump Resistor symptoms

Discussion in '2nd Gen. Tacomas (2005-2015)' started by tathambenjamin, Oct 7, 2019.

  1. Oct 7, 2019 at 6:15 PM
    #1
    tathambenjamin

    tathambenjamin [OP] Well-Known Member

    Joined:
    Jun 29, 2017
    Member:
    #222703
    Messages:
    297
    Gender:
    Male
    First Name:
    ben
    Vehicle:
    2008 4Runner SR5
    -2.5/1.5 spacer lift -270/65/17 Cooper AT3
    A couple days ago I noticed this guy bolted in front of the battery and behind headlight:


    https://www.amazon.com/Toyota-23080-31010-Fuel-Pump-Resistor/dp/B00TNNRLKW


    The wires connecting mine to the plug are frayed and insulation ripped off. Couple things I have been chasing...

    -truck takes a little longer than I would like to crank over. Not like I have to crank it over twice, but a beat or two longer than I recall doing when I had a 2008 4runner. New plugs, cleaned MAF, new filters and fluids all around.

    -mpg is pretty bad. I got 15 on an all around town tank. Drove a mostly highway tank yesterday and got 16.3 mpg. I just got the truck but was thingking I would get about 16-17 in town and 19-20 on the highway. My 4runner did about this, but it was automatic. Tacoma is a 6sp.

    Edit: 265/75/16 e rated tires, stock wheels, lifted 2in on OME shocks and 884. Cap and rack on the back, but not more than couple hundred lbs extra.

    Could the fuel pump resistor impact any of these things? Should i replace the resistor if it has been exposed to moisture or just throw some new wire and/or heat shrink over wires exposed and keep rolling. Looks like resistors are going for $45-60 so didnt want to just throw money at it.
     
  2. Oct 7, 2019 at 6:55 PM
    #2
    Lester Lugnut

    Lester Lugnut Well-Known Member

    Joined:
    Mar 3, 2010
    Member:
    #32477
    Messages:
    2,823
    Gender:
    Male
    N of Mex-S of Canada-E of LA-W of NC
    Vehicle:
    '15 Tacoma PreRunner V6 SR5 Auto
    If it were mine, I would replace it.
     
  3. Oct 7, 2019 at 7:02 PM
    #3
    tathambenjamin

    tathambenjamin [OP] Well-Known Member

    Joined:
    Jun 29, 2017
    Member:
    #222703
    Messages:
    297
    Gender:
    Male
    First Name:
    ben
    Vehicle:
    2008 4Runner SR5
    -2.5/1.5 spacer lift -270/65/17 Cooper AT3
    Ok, more curious about what the resistor not functioning or functioning improperly might cause in terms of symptoms?
     
  4. Oct 7, 2019 at 10:04 PM
    #4
    Jimmyh

    Jimmyh Well-Known Member

    Joined:
    May 16, 2012
    Member:
    #78991
    Messages:
    12,282
    Gender:
    Male
    SC
    Vehicle:
    2012 Prerunner SR5
    Here is a schematic and description of what it does.
    https://www.customtacos.com/tech.ol...6toyewd/06toypdf/ewd/2006/tacoma/h/em01d3.pdf

    The engine control module supplies current to TERMINAL FPR, and controls the operation speed of the fuel pump with the FUEL PUMP relay

    ** So basically when engine demand is high the ECU de-energizes the Fuel Pump Relay which removes the resistor from the circuit and the pump runs faster. When Idling or low demands the ECU energizes the Fuel Pump Relay and places the resistor in series with the pump and slows it down.

     
    Marc70 and TnShooter like this.
  5. Aug 20, 2020 at 4:40 PM
    #5
    Marc70

    Marc70 Well-Known Member

    Joined:
    Nov 30, 2015
    Member:
    #171048
    Messages:
    297
    Gender:
    Male
    First Name:
    Marc70
    Northern Ontario
    Vehicle:
    2012 TRD Sport 4.0L, 6MT
    3" lift, ARB front bumper, steel rear bumper, Trail Gear weld-on sliders, aFe cai, 2lo kit, air bag suspension
    @Jimmyh , so next time I blow my fpr, can I safely just short it out and keep driving for any length of time?
    I'm having a hard time finding a good cheap one online, can I just use any resistor of the same resistance?
    What is the resistance of the fpr?
     

Products Discussed in

To Top