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

4.7 Tacoma,stumbles when accelerated

Discussion in '4 Cylinder' started by scbill, Sep 16, 2013.

  1. Sep 16, 2013 at 12:55 PM
    #1
    scbill

    scbill [OP] Member

    Joined:
    Sep 15, 2013
    Member:
    #112517
    Messages:
    7
    Gender:
    Male
    Aiken Co SC
    Vehicle:
    Tacoma
    2002 2.7 Tacoma, Starts, and idles ok, but starves out when accelerated, will go to about 3grand on gradual before it starves. I have cleaned throttle body, & MAF. 89k miles, no evidence of shadetree tampering, all hoses,clamps are as they should be. Could it be the filter clogged, or weak fuel pump,or??? You can hear pump running when switched on.

    Thanks, Bill

    Edited to say...what is the psi for the fuel pump, and where is the test port located?
     
    Last edited: Sep 17, 2013
  2. Sep 16, 2013 at 5:00 PM
    #2
    camojared

    camojared Well-Known Member

    Joined:
    May 12, 2013
    Member:
    #104007
    Messages:
    349
    Gender:
    Male
    First Name:
    Jared
    NW Ohio
    Vehicle:
    07 4x4 SR5 2.7L 5spd
    Fog Lights Anytime, Second Air Filter Delete
    I wish I could get a 4.7 v8 in my tacoma ;) Sorry Im not much help just thought id point that out.
     
  3. Sep 17, 2013 at 5:23 AM
    #3
    scbill

    scbill [OP] Member

    Joined:
    Sep 15, 2013
    Member:
    #112517
    Messages:
    7
    Gender:
    Male
    Aiken Co SC
    Vehicle:
    Tacoma
    Don't know where I got 4.7 from...thanks for pointing that out, had a rough day.

    Bill
     
  4. Sep 17, 2013 at 1:44 PM
    #4
    camojared

    camojared Well-Known Member

    Joined:
    May 12, 2013
    Member:
    #104007
    Messages:
    349
    Gender:
    Male
    First Name:
    Jared
    NW Ohio
    Vehicle:
    07 4x4 SR5 2.7L 5spd
    Fog Lights Anytime, Second Air Filter Delete
    At least you got the 4cyl section right, your already off to a better start than me.:eek: Have you checked spark plugs? I would try some fuel system cleaner.
     
  5. Sep 18, 2013 at 5:39 AM
    #5
    scbill

    scbill [OP] Member

    Joined:
    Sep 15, 2013
    Member:
    #112517
    Messages:
    7
    Gender:
    Male
    Aiken Co SC
    Vehicle:
    Tacoma
    Gonna try fuel filter first, Checked TPS, it's Ok, talked to a mechanic friend, he thinks maybe MAF sensor, pump pres. seems to be OK. Took MAF with me to Pull-A-part, couldn't find one, put it back..runs worse than ever now.(thinking MAF)

    Can anyone tell me if there's a connection to check pump preassure, and where it is?????

    Bill
     
  6. Sep 18, 2013 at 8:52 PM
    #6
    kylenotjon

    kylenotjon Well-Known Member

    Joined:
    Jul 15, 2012
    Member:
    #82705
    Messages:
    51
    Gender:
    Male
    First Name:
    Kyle
    Telford, PA
    Vehicle:
    13 Regular Cab 4X4
  7. Sep 20, 2013 at 12:33 PM
    #7
    scbill

    scbill [OP] Member

    Joined:
    Sep 15, 2013
    Member:
    #112517
    Messages:
    7
    Gender:
    Male
    Aiken Co SC
    Vehicle:
    Tacoma
    Changed fuel filter, ran OK for short time, then back to same. Filter was totally blocked, looked like muddy water ran out of line from tank, guess it's pull the tank time. Is there a diagram of the hoses, and do you need special tools to disconnect anything? There was a black sediment also in the filter. Truck is an insurance total, and rebuilt, thinking it sat for a spell, no telling where, or what got in the tank.

    Bill
     
  8. Sep 23, 2013 at 6:48 AM
    #8
    scbill

    scbill [OP] Member

    Joined:
    Sep 15, 2013
    Member:
    #112517
    Messages:
    7
    Gender:
    Male
    Aiken Co SC
    Vehicle:
    Tacoma
    Fuel filter had a black powdery residue..Could this be pump going bad??? gonna pull the filter to see if it's clogged again. Got it running good enough to drive a short distance, stopped and let it sit for about 15 minutes, wouldn't start, hit it with starting fluid, started,and ran OK.

    Pulled #1 plug, it was black, running too rich looking. No way to check converter/muffler, runs really peppy, don't think it's that.

    One more thing, sprayed starting fluid into throttle body, started, and died, sprayed again,put intake tube back in place, started, and ran OK.

    If I had any hair, I would be pullin it out...Bill
     
  9. Sep 23, 2013 at 12:19 PM
    #9
    scbill

    scbill [OP] Member

    Joined:
    Sep 15, 2013
    Member:
    #112517
    Messages:
    7
    Gender:
    Male
    Aiken Co SC
    Vehicle:
    Tacoma
    Update...pump pressure 10/12 PSI...should be 25+ thinking the black stuff in the filter was pump parts. Pulled new filter, it is clean, checked pressure on both sides of filter checked same PSI on both sides. Tank pullin time...Oh well.

    Bill
     
  10. Oct 1, 2013 at 11:49 AM
    #10
    scbill

    scbill [OP] Member

    Joined:
    Sep 15, 2013
    Member:
    #112517
    Messages:
    7
    Gender:
    Male
    Aiken Co SC
    Vehicle:
    Tacoma
    Bad fuel pump...all OK..B
     
To Top