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Thread: Lots of black smoke and no power 6.5 diesel

  1. #1
    Join Date
    May 2017
    Location
    Seattle Washington
    Posts
    3

    Default Lots of black smoke and no power 6.5 diesel

    I have a 1995 gmc 1500 So I noticed my truck has been putting out a lot of back smoke when you get on it and feels like it has no boost or power.
    List of parts I have replaced and cleaned
    Map sensor
    Turbo boost sensor
    Vaccum pump
    New Pdm and relocation kit
    Turbo boost selnoid
    New fuel filter

    The truck has stalled on me before and takes alittle bit to start back up but will start
    Also when I'm starting from a stop the truck will kinda jerk alittle bit then after the jerk it will drive just fine

  2. #2
    Join Date
    Mar 2000
    Location
    Loyal WI US
    Posts
    10,792

    Default

    Quote Originally Posted by Ryanr8 View Post
    I have a 1995 gmc 1500 So I noticed my truck has been putting out a lot of back smoke when you get on it and feels like it has no boost or power.
    List of parts I have replaced and cleaned
    Map sensor
    Turbo boost sensor
    Vaccum pump
    New Pdm and relocation kit
    Turbo boost selnoid
    New fuel filter

    The truck has stalled on me before and takes alittle bit to start back up but will start
    Also when I'm starting from a stop the truck will kinda jerk alittle bit then after the jerk it will drive just fine

    A boost gauge is key to diagnosing these issues. That or a vacuum gauge to test the wastegate control system.
    Kennedy Diesel-owner
    More than just a salesman-I use and test the products that I sell on a daily basis!
    Superflow Lie Detector in house
    2002 Chev K2500HD D/A CC Long LT 11.77@ 124mph at 7700# fuel only-e.t. needs help
    2005 Chev K3500SRW D/A CC Long LT(SOLD)
    2007 Chev K2500 Classic EC Short LT (Sold)
    2012 GMC K3500SRW D/A CC Long LTZ Happy Birthday to me! Built 1 working day after my birthday and delivered 7 days later.
    2016 GMC K3500SRW D/A CC short LTZ

    Custom tuning in house using EFI Live tuning software!

  3. #3
    Join Date
    May 2017
    Location
    Seattle Washington
    Posts
    3

    Default

    Where can I tap in to install a boost Guage i have one laying around the house right now

  4. #4
    Join Date
    Feb 2003
    Location
    Grand Rapids MN 55744
    Posts
    1,648

    Default

    Howdy
    I tapped into the air horn on top of the manifold. This is the top of the manifold that connects to the turbo.
    This can be done pretty easy. loosen the silicon coupling to the turbo, 6 bolts to remove the horn, pick a spot along the edge that has thick material, drill and tap a 1/8 pipe thread. Make sure you don't get metal in the manifold. On most air horns there is a small flat area on the back passenger edge(?) that is a great spot for this, but any place on the air horn or manifold will work.
    Good luck!
    1996 Chvy 3500 CCDWLB 6.5 Heathed, NO vac, marine injctrs, ARB bumper, BIG pipe, 3" lift, bright lights, bypass oil system.
    1986 Chvy 6.2 M1009 blazer RAM AIR, Headers, Custom interior
    2001 Chinook RV, V10 gas
    1974 John Deere 1530 diesel tractor
    1993 John Deere 455 Diesel lawn mower
    1967 GTO, 1989 Honda Transalp
    2009 VW Jetta TDI, flashed and piped, 6speed, fun car!
    1998 6.5 suburban, stock, daughter's
    1993 6.5 3500 CCSWLB GM8, Heathed, big exhaust, gauges, Son's

    1984 6.2 ATS turbo 3500, SCDWLB - Son's
    3 kids, 1 wife, 1 dog
    Gunsmith, Tactics Instructor, Fabricator USMC 87-93 Semper Fi!

  5. #5
    Join Date
    May 2017
    Location
    Seattle Washington
    Posts
    3

    Default

    The upper manifold all that's on there is my egr and map sensor and iat sensor

  6. #6
    Join Date
    Feb 2003
    Location
    Grand Rapids MN 55744
    Posts
    1,648

    Default

    Right, upper manifold. My wording is different. Any place in the upper is fine. The thicker the better.
    1996 Chvy 3500 CCDWLB 6.5 Heathed, NO vac, marine injctrs, ARB bumper, BIG pipe, 3" lift, bright lights, bypass oil system.
    1986 Chvy 6.2 M1009 blazer RAM AIR, Headers, Custom interior
    2001 Chinook RV, V10 gas
    1974 John Deere 1530 diesel tractor
    1993 John Deere 455 Diesel lawn mower
    1967 GTO, 1989 Honda Transalp
    2009 VW Jetta TDI, flashed and piped, 6speed, fun car!
    1998 6.5 suburban, stock, daughter's
    1993 6.5 3500 CCSWLB GM8, Heathed, big exhaust, gauges, Son's

    1984 6.2 ATS turbo 3500, SCDWLB - Son's
    3 kids, 1 wife, 1 dog
    Gunsmith, Tactics Instructor, Fabricator USMC 87-93 Semper Fi!

  7. #7
    Join Date
    May 2017
    Location
    North Carolina
    Posts
    36

    Default Turbo Boost Bolt

    Go to Leroydiesel.com and buy the turbo boost both and replace one the the 2 center bolts on the plenum and then attach the boost gauge to that. Turbo boost bolt is 30 bucks and no drilling and tapping required.
    1995 Chevy 2500, 6.5L Diesel mostly stock 234,000 miles. Changed the water pump to HO WP, deleted the vacuum pump and added a mechanical wastegate controller made by me with info from others on the forum.

  8. #8
    Join Date
    Mar 2000
    Location
    Loyal WI US
    Posts
    10,792

    Default

    Dril and tap the round part of the upper intake plenum with the port facing rearward. Less strain and good solid mounting point.

    Shown in one of my pics here:

    http://www.kennedydiesel.com/airboxmods.cfm
    Kennedy Diesel-owner
    More than just a salesman-I use and test the products that I sell on a daily basis!
    Superflow Lie Detector in house
    2002 Chev K2500HD D/A CC Long LT 11.77@ 124mph at 7700# fuel only-e.t. needs help
    2005 Chev K3500SRW D/A CC Long LT(SOLD)
    2007 Chev K2500 Classic EC Short LT (Sold)
    2012 GMC K3500SRW D/A CC Long LTZ Happy Birthday to me! Built 1 working day after my birthday and delivered 7 days later.
    2016 GMC K3500SRW D/A CC short LTZ

    Custom tuning in house using EFI Live tuning software!

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