Results 1 to 4 of 4

Thread: Smoke at idle and haze through rpm range

  1. #1
    Junior Member
    Join Date
    Dec 2012
    Posts
    11

    Default Smoke at idle and haze through rpm range

    Hey guys, I have a 07.5 6.7 deleted.

    I've installed industrial injection R2 injectors and an 85% over cp3. Truck has a lift pump, head studs, 5" exhaust, and a really nice trans tune. I have also milled off the stock intake manifold and installed a b&b tooling intake manifold. Stock everything else.

    The biggest concern is that I'm sick of it smoking at idle. I've tried a lot of things: rail pressure, injection amount, duration. I'm getting no where.

    Ive talked with tuners, they think it's just not getting enough airflow. There's no way, to me that's the problem with idle. If anyone can point me in any kind of direction, that would be great.


    Thanks,
    Matt

  2. #2
    Member
    Join Date
    Oct 2014
    Posts
    91

    Default

    Timing is the biggest thing for keeping smoke down at idle and cruise.

  3. #3
    Junior Member
    Join Date
    Dec 2012
    Posts
    11

    Default

    I'm using the timing calculator. How far out is generally safe for adjustment?

  4. #4
    Lifetime Member THEFERMANATOR's Avatar
    Join Date
    Mar 2009
    Posts
    800

    Default

    For idle and off idle the calculator doesn't work. Your going to have to work with it until you find what it likes. Your going to need to increase pressure at idle. But my experience has been pilot tuning is the key. On bigger 8njectors, SMALL changes to pilot make BIG changes to the overall tune. I'm only running 45 overs in my Duramax, but it hazed something awful, I cleared most of it up by getting the pulse tables so the idle fuel amount was close to stock, and fine tuning pilot amount and timing.
    1995 GMC 2500 SUBURBAN powered by 01 DURAMAX/ALLISON, little of this, a little of that,
    DIAMONDEYE 4" exhaust, CORSA muffler, AFE stage 1 dry filter, custom tuning by me, KENNEDY single pump and pump rub kit.

Similar Threads

  1. 2016 LML haze at idle...
    By 02CCSB in forum Duramax 2011+ LML / LGH
    Replies: 2
    Last Post: January 9th, 2018, 03:59 AM
  2. E40 idle RPM won't go below 800 RPM
    By ACCLR8N in forum Gen IV V8 Specific
    Replies: 5
    Last Post: June 4th, 2014, 07:46 AM
  3. Why not use MAF for entire RPM range?
    By LS1_Dragster in forum Custom Operating Systems
    Replies: 24
    Last Post: July 7th, 2011, 08:45 AM
  4. White smoke at idle
    By bhamdmax in forum Duramax LB7
    Replies: 0
    Last Post: February 15th, 2011, 07:40 AM
  5. LBZ smoke: Fuel Qty vs RPM-B1117 not working
    By killerbee in forum Duramax 06 LLY / 06+ LBZ & LMM
    Replies: 2
    Last Post: November 5th, 2009, 03:59 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •