Results 1 to 3 of 3

Thread: TVS 1900 on 5.3 Low timing and Odd Knock

  1. #1
    Junior Member
    Join Date
    Jun 2012
    Posts
    39

    Default TVS 1900 on 5.3 Low timing and Odd Knock

    Hello everyone,
    First of all, I am clearly not a professional tuner, nor did I stay at a Holiday Inn Express last night. What I am, is completely irritated with the "Professional Tuners" I have given a lot of money and my time to, just to end up where I am. The current project is a 2000 Sierra LS1B with a cammed 5.3 and TVS1900 with a 3.1 pulley and ID 850's. Its weak pretty much everywhere except the initial throttle tip in. I have a WB, but misplaced the connectors for my V2, so I cannot log it yet. In the log below, the timing is all over the place, even down to 6deg or so at idle. There is some KR that comes and goes. I have never heard any knock, and the sensors are stock. I have a 2bar MAP and using COS5, but I get a max of 105kpa, but this is while the engine is running and not in baro measure mode (presumably). The max PE looks very lean in the tune, but my WB sees 10.75 AFR. I am not sure I even have the knowledge to find all the issues with this tune. The trans is another story, but first things first.

    So here is my data, can someone point me in the right direction? Or happen to be in the DC, MD NoVA area?

    Thank you!!
    Attached Files Attached Files

  2. #2
    Lifetime Member
    Join Date
    Aug 2013
    Posts
    735

    Default

    Quote Originally Posted by Hambone View Post
    What I am, is completely irritated with the "Professional Tuners" I have given a lot of money and my time to, just to end up where I am.
    Yeah, I see it all the time. Some of those tuners haven't got a clue what they're doing.


    Quote Originally Posted by Hambone View Post
    I am not sure I even have the knowledge to find all the issues with this tune. The trans is another story, but first things first.
    This site has a lot of really good information... you just have to dig around to find it all. If you like reading, there's also the HPTuners forum and the LS1Tech forum. It's a steep learning curve, but it's very gratifying when you can tune your engine better than the so called 'professional' tuners.

  3. #3
    Lifetime Member
    Join Date
    Dec 2014
    Posts
    230

    Default

    Wow, thats basically a stock tune..... LOL, "pro". I'm headed home from a gig in mexico and I'd be willing to help guide you through this once i get back.

    Creds.....

Similar Threads

  1. 2014 Camaro ZL1 knock with low timing
    By Thornader in forum E37, E38 & E67 PFI ECM's
    Replies: 1
    Last Post: May 16th, 2014, 12:48 PM
  2. Knock sensor circuit low signal...
    By VTC_WS6 in forum Gen III V8 Specific
    Replies: 4
    Last Post: July 13th, 2013, 05:58 PM
  3. need help weird low timing
    By Dale C in forum Gen III V8 Specific
    Replies: 1
    Last Post: February 6th, 2013, 09:29 AM
  4. What caused this low rpm knock ?
    By wesam in forum Gen III V8 Specific
    Replies: 50
    Last Post: July 15th, 2010, 11:13 AM
  5. Tvs
    By Chevy366 in forum Lounge
    Replies: 3
    Last Post: February 23rd, 2008, 12:34 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
  •