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  1. #1

    Default Now i am screwed

    Here i go, remember about my problem with truck not starting ?????,,,,,well, today i found out that there is a short somewhere in the wiring harnes because now the fuel pump don't work and the NEW ecm don't conect to the scanner anymore either.

    Its going to be time to bring to GM ?!

    Any other thoughts ??????????????

    I already know this is going to be costy........

    1996 Suburban K3500 SLT DUALLY
    1988 Camaro RS 383 stroker LT1
    1992 32' Aero-tek Race Boat, 600 CI BBC
    WE CAN STICK A DIESEL IN ANYTHING
    SPECIALIZED IN CUSTOM CONVERSIONS OF ANY KIND
    Scott:glasses:

  2. #2

    Default

    the fuel pump is commanded on by the computer so thats not so bad.if the scanner and pcm are not comunicating the could be a ground issue. But im not familiar with your project and not sure what you have done to this point

    99 tahoe 2 dr. 4x4 7.4 4L80-e NP246, SAS, dana 60 hp, sterling 10.5 rear, gibson headers, and alot of tricks of the trade !!!!!!IF YOU'RE NOT CHEATING YOUR NOT TRYING!!!!!!!!

  3. #3

    Default

    I have done nothing,,,,ALL STOCK .

    1996 Suburban K3500 SLT DUALLY
    1988 Camaro RS 383 stroker LT1
    1992 32' Aero-tek Race Boat, 600 CI BBC
    WE CAN STICK A DIESEL IN ANYTHING
    SPECIALIZED IN CUSTOM CONVERSIONS OF ANY KIND
    Scott:glasses:

  4. #4
    Legend s5belford's Avatar
    Join Date
    Apr 2009
    Location
    Kalamazoo Michigan
    Posts
    1,456

    Default

    On our old 94 3500 we had a similar sounding problem, turned out that the trailer place that hooked up the hitch/brakes/lights did a shotty job connecting wires (they used one of those alligator clamps) somewhere it ate through the wires, we were driving down the highway pulling 4 horses and she just quit running.... sorry I can't give you more exact details but it was around 10 years ago.

    Hope I could be of some help.


    S.BELFORD

    2009 Silverado LT1: All Star Edition
    5.3 Liter V8 4x4

    Factory:
    Locking Rear Differential
    3.73 Rear Axle
    Fog Lamps
    Factory Remote Start
    Locking Tailgate
    20" Wheels

    Aftermarket:
    Rear Wheel House Liners
    Molded Mud Flaps
    Stainless Nurf Bars
    Driver Information Center
    20% Tinted Windows
    Low Profile Diamond Plate Tool Box
    GM Bed Liner
    Silver Birch Metallic Mirror Covers
    Silver Birch Metallic Vent Visors
    Flowmaster Super 40 (knock off)
    20" Wheels
    Bed Rail Protectors
    Extang Tonneau Cover

  5. #5

    Default

    Did it stop running one day and you have been workinh on it ? I saw a post that you were getting pcm flashed or something whats the history here? I can tell you that a few people have had issues with the two grounds at t.stat housing and pass. side back of block are the main grounds

    99 tahoe 2 dr. 4x4 7.4 4L80-e NP246, SAS, dana 60 hp, sterling 10.5 rear, gibson headers, and alot of tricks of the trade !!!!!!IF YOU'RE NOT CHEATING YOUR NOT TRYING!!!!!!!!

  6. #6

    Default

    I parked and idled for about 5 min, then it died.
    Never ran since, so i changed all the ignition stuff, the relays and the ECM , i did add a ground on the T-housing and i did add some fog lights, but they are wired correct.

    The fuel pump still ran , now it will not .

    The ECM is not comunicating with anything, my old one is not either.

    THATS WHERE I AM . I will take it to a gm dealer on thursday or friday.

    Don't have no other way,,need it to make money.

    1996 Suburban K3500 SLT DUALLY
    1988 Camaro RS 383 stroker LT1
    1992 32' Aero-tek Race Boat, 600 CI BBC
    WE CAN STICK A DIESEL IN ANYTHING
    SPECIALIZED IN CUSTOM CONVERSIONS OF ANY KIND
    Scott:glasses:

  7. #7
    Legend unplugged's Avatar
    Join Date
    Sep 2006
    Location
    High Deserts of SoCal
    Posts
    2,554

    Default

    Oil pressure switch is in the fuel pump circuit as a safety feature. Did you check the OPS and connector?
    There is no way to happiness....happiness is the way.:yipi:
    http://kx6ijq.blu.livefilestore.com/y1pcOFVNH4ix1hjyGUVyXK5LRfef7qSeWzlZDorpQhIEfkZ2ZA  _vXMYypuKMJFw671uF2ZPhjez_j-atRmcjM2zQKpQi1JSsB75/burb1.JPG
    High Desert SoCal
    93 K1500 burb (personal) 350 AT 3" Lift 250K+
    02 Honda Civic LX
    Looking for a 1990's Miata for an engine swap

  8. #8

    Default

    Quote Originally Posted by unplugged View Post
    Oil pressure switch is in the fuel pump circuit as a safety feature. Did you check the OPS and connector?
    where is it ???? I changed the crank sensor, where is the ops ?

    1996 Suburban K3500 SLT DUALLY
    1988 Camaro RS 383 stroker LT1
    1992 32' Aero-tek Race Boat, 600 CI BBC
    WE CAN STICK A DIESEL IN ANYTHING
    SPECIALIZED IN CUSTOM CONVERSIONS OF ANY KIND
    Scott:glasses:

  9. #9

    Default

    its on the back of motor behind dist. But if the scanners not communicating with pcm thats a problem my books are at my dads shop right now but i will get over and look at the trouble shooting on this problem
    Last edited by azdrtdog; 01-06-2010 at 09:45 AM.

    99 tahoe 2 dr. 4x4 7.4 4L80-e NP246, SAS, dana 60 hp, sterling 10.5 rear, gibson headers, and alot of tricks of the trade !!!!!!IF YOU'RE NOT CHEATING YOUR NOT TRYING!!!!!!!!

  10. #10

    Default

    Quote Originally Posted by azdrtdog View Post
    its on the back of motor behind dist. But if the scanners not communicating with pcm thats a problem my books are at my dads shop right now but i will get over and look at the trouble shooting on this problem

    I think u need to grab those books and fly down here !!!!!!!

    1996 Suburban K3500 SLT DUALLY
    1988 Camaro RS 383 stroker LT1
    1992 32' Aero-tek Race Boat, 600 CI BBC
    WE CAN STICK A DIESEL IN ANYTHING
    SPECIALIZED IN CUSTOM CONVERSIONS OF ANY KIND
    Scott:glasses:

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