Results 1 to 5 of 5

Thread: E38 08 LS7 cam/milled heads won't run in SD mode

  1. #1
    Member Age08's Avatar
    Join Date
    Jun 2012
    Posts
    77

    Default E38 08 LS7 cam/milled heads won't run in SD mode

    E38 08 corvette LS7 cam227/243 115 stock heads milled .020
    It will not stay running when in SD mode.
    I setup the sd open loop as per https://forum.efilive.com/showthread...VE-Setup-Guide
    got the up to temp on the stock tune, then installed sd one, removed the wire on the maf
    I even tried multiplying the B8101 by 2 times thinking it was to learn without success.
    Any ideas?
    Also attached is the car running with the stock tune with the only modification is idle speed and timing
    Attached Files Attached Files

  2. #2
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    28,403

    Default

    Maybe: looks like it runs out of spark timing range, i.e. so it can't control idle.

  3. #3
    Member Age08's Avatar
    Join Date
    Jun 2012
    Posts
    77

    Default

    Figured it out,
    The problem is with the cam, because it makes the map sensor read low(high engine load), it was added to much fuel/not enough timing.
    my thinking was that there wasn't enough fuel when in fact it was getting to much and no timing because it was reading a higher load section of the VVE Table, All I did was removed 30% out of the VVE table from 0-1200 rpm now it starts and idles good enough to start logging.

  4. #4
    Senior Member
    Join Date
    May 2009
    Posts
    155

    Default

    What made you think to remove the fuel and ad the timing. Would it try to start then die or just crank without catching at all?

  5. #5
    Member Age08's Avatar
    Join Date
    Jun 2012
    Posts
    77

    Default

    I found there was a problem with the original tune I was using. I started off from scratch again with a stock tune and ended up putting fuel into the whole table and got it decently tuned for street tuning, next will be dyno session.

Similar Threads

  1. Installing heads/cam/injector then procharger
    By Cool28 in forum Gen III V8 Specific
    Replies: 0
    Last Post: May 12th, 2014, 08:56 AM
  2. 00 gm 5.3 cam heads wont idle in gear.
    By eigerman8909 in forum Gen III V8 Specific
    Replies: 3
    Last Post: March 28th, 2012, 09:36 AM
  3. Tuning after heads and cam install
    By minytrker in forum General (Petrol, Gas, Ethanol)
    Replies: 11
    Last Post: October 25th, 2008, 12:52 PM
  4. HELP::::::Heads/Cam car will not run in OL.
    By Chalky in forum General (Petrol, Gas, Ethanol)
    Replies: 14
    Last Post: April 21st, 2007, 01:57 PM
  5. How do I tune for heads/cam?
    By Blk02Ls1A4 in forum General (Petrol, Gas, Ethanol)
    Replies: 0
    Last Post: June 2nd, 2005, 01:15 AM

Posting Permissions

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