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
    Quick Links: Best battery terminals to buy Uca moog bushing part# Spark plug wires This can't be right!?! Shock bottoming out Larger Oil Filter AFE Pro dry vs. Pro-5R (oiled)

Surging/Thrusting Problem Under Acceleration

Discussion in '1st Gen. Tacomas (1995-2004)' started by jberry813, Jan 2, 2013.

Page 11 of 14
  1. Jan 16, 2013 at 6:58 PM
    #201
    jberry813

    #201
    jberry813 [OP] Professional Fluffer Moderator

    Joined:
    Jan 21, 2011
    Member:
    #49636
    Messages:
    28,471
    Gender:
    Male
    First Name:
    Jason
    Lake Tahoe
    Vehicle:
    2012 DCSB Sport
    ...too much shit to list.
    Well, Tyler came over. I tore his truck apart for nothing. :mad:
    Ended up swapping plug wires, coils, MAF, and A/F and made zero difference. Best guess now is the TPS/something with the TB, or the ECM. Tyler has a 2001 and the TB is a regular vacuum TB so i couldn't try his. Calling the Brit tomorrow and making an appointment to leave the truck with him and let him figure it out.

     
    jberry813, Jan 16, 2013
    #201
  2. Jan 16, 2013 at 8:27 PM
    #202
    Shaggs

    #202
    Shaggs Well-Known Member

    Joined:
    Feb 26, 2012
    Member:
    #73708
    Messages:
    1,893
    Gender:
    Male
    First Name:
    Matt
    NorCal
    Vehicle:
    2012 DoubleCab Long Bed 4x4 TRD Magnetic Gray
    dude, TB or TPS... been saying it. You need that Scangauge?
     
    Shaggs, Jan 16, 2013
    #202
  3. Jan 16, 2013 at 11:16 PM
    #203
    jberry813

    #203
    jberry813 [OP] Professional Fluffer Moderator

    Joined:
    Jan 21, 2011
    Member:
    #49636
    Messages:
    28,471
    Gender:
    Male
    First Name:
    Jason
    Lake Tahoe
    Vehicle:
    2012 DCSB Sport
    ...too much shit to list.
    Yeah I hear ya.
    I got TIS cable and techstream software coming in the mail that can do all that. Thanks.
     
    jberry813, Jan 16, 2013
    #203
  4. Jan 16, 2013 at 11:37 PM
    #204
    TC yota

    #204
    TC yota Well-Known Member

    Joined:
    Feb 4, 2010
    Member:
    #30692
    Messages:
    2,127
    Gender:
    Male
    First Name:
    Tyler
    Escondido
    Ha
    This would be soooo much easier if you had a wideband meter on that thing! Should have one anyways with a supercharger!
     
    TC yota, Jan 16, 2013
    #204
  5. Jan 17, 2013 at 12:08 AM
    #205
    jberry813

    #205
    jberry813 [OP] Professional Fluffer Moderator

    Joined:
    Jan 21, 2011
    Member:
    #49636
    Messages:
    28,471
    Gender:
    Male
    First Name:
    Jason
    Lake Tahoe
    Vehicle:
    2012 DCSB Sport
    ...too much shit to list.
    I'm expanding my horizons.
    Seems it might be a problem specific to 2003/2004 tacomas with their retarded throttle bodies. Dead on to my symptoms:
     
    jberry813, Jan 17, 2013
    #205
  6. Jan 17, 2013 at 7:07 AM
    #206
    BamaToy1997

    #206
    BamaToy1997 Wheel Bearing Master

    Joined:
    Jan 31, 2012
    Member:
    #71846
    Messages:
    10,792
    Gender:
    Male
    First Name:
    Bill
    Navarre, FL
    Vehicle:
    1997 Tacoma 4X4 AKA "Blue Beast"
    best wheel bearings around! www.marionbumper2bumper.com
    You know what, I should have thought about that. Just goes to show how anyone can make a simple mistake and miss something. Again, if you had a dang scope you could scope out the signal to see if there is something erratic. I am still curious how the fuel pressure flutters. My original train of thought was that the fluttering fuel pressure was the cause of the surging. With all that has been done I am now curious if the fluttering is a RESULT of the failure instead of the cause? I will admit your truck has been a challenge, but I like challenges. I am in for the long haul here though. Let me know if there is anything that I can do to help.
     
    BamaToy1997, Jan 17, 2013
    #206
  7. Jan 17, 2013 at 4:54 PM
    #207
    jberry813

    #207
    jberry813 [OP] Professional Fluffer Moderator

    Joined:
    Jan 21, 2011
    Member:
    #49636
    Messages:
    28,471
    Gender:
    Male
    First Name:
    Jason
    Lake Tahoe
    Vehicle:
    2012 DCSB Sport
    ...too much shit to list.
    Techstream software is actually nice. Lots of features, but didn't help me one damn bit (other than to tell me the rear ABS speed sensors are disconnected). :D
    Swept the TPS with Techstream and swept the TPS with a voltmeter. It swept fine, but the refresh rate is slow. Still need a graphing meter or oscilloscope to see if there are any small blips but I went as slow as I could and numbers were completely consistent. .
    The Brit told me to bring it by Saturday, so I'm picking up 6 pack of Guinness as a plea bargain and see what it gets me.
     
    jberry813, Jan 17, 2013
    #207
  8. Jan 19, 2013 at 8:01 PM
    #208
    kickergt

    #208
    kickergt Well-Known Member

    Joined:
    Nov 16, 2012
    Member:
    #91260
    Messages:
    83
    Gender:
    Male
    First Name:
    Shaun
    Fresno Ca
    00 Tacoma TRD 4x4 329WHP 390Wtq Turbo sucka
    OK here is an update. Round town curse is 100% fixed. Climbing surge will be tested tomorrow. The issue was in the tune. No sensor issues at all. The problem (so far) was the air fuel ratio in open loop was too far off and the ecu had to compensate too much in closed loop. The o2 would pick up a lean or rich condition and try too hard to fix it thus over correcting. Then after that over correction it would do it again the other direction. I got my AF at cruse and Lt load to 13.0 to 13.8 in open loop. (Unplugged the front o2). Once I cleared the codes and plugged the o2 back in. No more surge.
     
    kickergt, Jan 19, 2013
    #208
  9. Jan 22, 2013 at 3:34 PM
    #209
    jberry813

    #209
    jberry813 [OP] Professional Fluffer Moderator

    Joined:
    Jan 21, 2011
    Member:
    #49636
    Messages:
    28,471
    Gender:
    Male
    First Name:
    Jason
    Lake Tahoe
    Vehicle:
    2012 DCSB Sport
    ...too much shit to list.
    Swapped in a different complete different throttle body and my original fuel pump.
    Same thing.




    This is such bullshit...............
     
    jberry813, Jan 22, 2013
    #209
  10. Jan 22, 2013 at 3:52 PM
    #210
    87xjmike

    #210
    87xjmike Well-Known Member

    Joined:
    Jan 25, 2011
    Member:
    #49899
    Messages:
    800
    Gender:
    Male
    Folsom
    Vehicle:
    98 5lug 2rz
    downey mid travel 2wd set up
    I may have missed it but what were your compression numbers? Did you do a leakdown test to?
     
    87xjmike, Jan 22, 2013
    #210
  11. Jan 22, 2013 at 3:54 PM
    #211
    jberry813

    #211
    jberry813 [OP] Professional Fluffer Moderator

    Joined:
    Jan 21, 2011
    Member:
    #49636
    Messages:
    28,471
    Gender:
    Male
    First Name:
    Jason
    Lake Tahoe
    Vehicle:
    2012 DCSB Sport
    ...too much shit to list.
    Never did one. I lost my compression tool and Oreilly didn't have one to rent.
    I kinda ruled it out in my head because the problem goes away when i go into open loop (either by WOT or disconnecting A/F sensor).
     
    jberry813, Jan 22, 2013
    #211
  12. Jan 22, 2013 at 5:21 PM
    #212
    jberry813

    #212
    jberry813 [OP] Professional Fluffer Moderator

    Joined:
    Jan 21, 2011
    Member:
    #49636
    Messages:
    28,471
    Gender:
    Male
    First Name:
    Jason
    Lake Tahoe
    Vehicle:
    2012 DCSB Sport
    ...too much shit to list.
    Ok so, on a separate hunch, I unbolted my exhaust after the first cat and slid it to the side. I unbolted here rather than before the first cat because it's only two bolts and the first cat also has the AF sensor bung as part of the same piece. This bypassed the secondary cat completely and the downstream O2. Aside from it being mind numbingly loud, my truck is running like a fucking raped ape and I'm not feeling any surging. Granted it's difficult to feel anything with the exhaust as it is now, but holy piss it is pulling with more power than I've felt in a long time.

    Can a plugged cat cause this?
     
    jberry813, Jan 22, 2013
    #212
  13. Jan 22, 2013 at 5:27 PM
    #213
    Steves104x4

    #213
    Steves104x4 Well-Known Member

    Joined:
    Apr 17, 2010
    Member:
    #35468
    Messages:
    15,834
    Gender:
    Male
    First Name:
    Steve
    Buffalo NY
    Vehicle:
    2010 RC 2.7 4x4
    BUCKLE UP! It makes it harder for Aliens to pull you out of your Truck.
    Probably.
     
    Steves104x4, Jan 22, 2013
    #213
  14. Jan 22, 2013 at 5:31 PM
    #214
    ian408

    #214
    ian408 Well-Known Member

    Joined:
    Nov 8, 2009
    Member:
    #25619
    Messages:
    19,102
    Gender:
    Male
    First Name:
    Ian
    Santa Clara, CA
    Vehicle:
    09 Tacoma
    Yes.

    I had to look up the code but you should see a P0420 code if the cat's efficiency decreases. There are some cleaning products-no idea if they work or not.
     
    ian408, Jan 22, 2013
    #214
  15. Jan 22, 2013 at 5:31 PM
    #215
    RAT PRODUCTS

    #215
    RAT PRODUCTS Well-Known Member

    Joined:
    Apr 12, 2010
    Member:
    #35140
    Messages:
    13,728
    Gender:
    Male
    First Name:
    Ryan
    Farmington, MN
    Vehicle:
    Cummins Coal Roller
    Smokin with a smarty.
    Very likely that it's a plugged cat now that you mention the power is back. Number one sign of a plugged cat is a drop in power.
     
    RAT PRODUCTS, Jan 22, 2013
    #215
  16. Jan 22, 2013 at 6:40 PM
    #216
    jberry813

    #216
    jberry813 [OP] Professional Fluffer Moderator

    Joined:
    Jan 21, 2011
    Member:
    #49636
    Messages:
    28,471
    Gender:
    Male
    First Name:
    Jason
    Lake Tahoe
    Vehicle:
    2012 DCSB Sport
    ...too much shit to list.
    E13F30C9-B048-4B42-93DA-77E654E860D0-612_d212edaad8e134b0bb8c6b89025542e7387926ab.jpg

    478621FD-7BF3-49F3-9632-3A5398869D1D-612_ad45477d2979d33a30987092dc565d0060c91222.jpg

    C963B38A-1725-4607-9572-6C1543317A6D-612_ee552e151d75924b3d6cc8db288d11745290130b.jpg

    1072B772-A5CD-4E0B-AD77-59EF70BC042C-612_e2976f385713752a9458616917ee0e5a38c90783.jpg

    Exhaust cooled enough to get some pix. All pix are looking down the direction of exhaust flow. Looks like some white shit all over. Last pic is with a led flashlight on the backside and you can see how little light is shining thru.

    Soon as it cools all the way, I'm gutting it.
     
    jberry813, Jan 22, 2013
    #216
  17. Jan 22, 2013 at 8:48 PM
    #217
    Shaggs

    #217
    Shaggs Well-Known Member

    Joined:
    Feb 26, 2012
    Member:
    #73708
    Messages:
    1,893
    Gender:
    Male
    First Name:
    Matt
    NorCal
    Vehicle:
    2012 DoubleCab Long Bed 4x4 TRD Magnetic Gray
    usually see a p0420, but sounds like a good candidate. I have seen it on plenty of vehicles but it usually will reduce power under any accel. Imagine running a marathon while breathing through a coffee straw...

    Somebody say Test Pipe with 02 defoulers on downstream?... :)
     
    Shaggs, Jan 22, 2013
    #217
  18. Jan 22, 2013 at 9:06 PM
    #218
    ian408

    #218
    ian408 Well-Known Member

    Joined:
    Nov 8, 2009
    Member:
    #25619
    Messages:
    19,102
    Gender:
    Male
    First Name:
    Ian
    Santa Clara, CA
    Vehicle:
    09 Tacoma
    Dude. That thing looks like the bottom of the space shuttle.
     
    ian408, Jan 22, 2013
    #218
    Biscuits likes this.
  19. Jan 22, 2013 at 11:57 PM
    #219
    jberry813

    #219
    jberry813 [OP] Professional Fluffer Moderator

    Joined:
    Jan 21, 2011
    Member:
    #49636
    Messages:
    28,471
    Gender:
    Male
    First Name:
    Jason
    Lake Tahoe
    Vehicle:
    2012 DCSB Sport
    ...too much shit to list.
    I made a quick ghetto test pipe with some spare tubing and mismatched flanges and half ass bolted it back up in place just so it wasn't so loud so I could get a really good feel and test. Truck ran just as great and still no more surging.

    Second cat was plugged up tighter than a virgin's ass. Gutted it completely and bolted it all back up. Got back a ton of power that I thought I lost, but was sure it was all in my head. Put my supercharger and brand new cooler plugs back on and it's running like a bat out of hell again. When I get some time this week I'll drop the tank (again), put the larger fuel pump back in and go back to the smaller pulley, piggyback and 7th injector and be happy as a pig in shit again. Since I still have the first cat in I'm betting the downstream O2 isn't going to complain. If it does, I'll get an O2 simulator from URD and call it a day.

    Thanks for everyone's input
     
    jberry813, Jan 22, 2013
    #219
  20. Jan 23, 2013 at 3:30 AM
    #220
    smuook

    #220
    smuook Daily Driver "Plus"

    Joined:
    Nov 23, 2009
    Member:
    #26418
    Messages:
    439
    Gender:
    Male
    First Name:
    Smuook
    Loganville, GA
    Vehicle:
    2004 DC V6 PreRunner
    Billy 5100, Satoshi, MBW Wheels, All Pro Front Bumper with 3x PIAA 530, LED dash lighting, other stuff too much to list
    Great news, congrats on the fix. Can you explain the process of gutting the cat and how difficult it was? Just think it might be useful info for the future. ;) Thanks.
     
    smuook, Jan 23, 2013
    #220
Page 11 of 14

Products Discussed in

BG 44K Fuel System Cleaner Power Enhancer 11oz.
$24.95
To Top