Results 1 to 4 of 4

Thread: Corvette LS3 procharged exhaust flap / EFCM opening ?

  1. #1
    Lifetime Member Boost's Avatar
    Join Date
    Dec 2006
    Posts
    1,506

    Question Corvette LS3 procharged exhaust flap / EFCM opening ?

    Looking at service info, several modules contribute to operation of Exhaust Flow Control Module (flaps).

    '08 automatic Vette, flaps opening at idle with procharger tune. Any way yo monitor / control this with EFILive? Don't see a direct PID / chart / map / tab so far in cal.

    Will post additional findings. Thanks!!!
    '12 Caprice PPV 6.0 L77 - daily transportation
    8.7 @ 84 (1/8 mile) bolt-ons

    '02 Silverado RCSB 5.3 L59 - regularly street driven
    8.2 @ 86 (1/8 mile) stock cam and spray
    8.6 @ 84 (1/8 mile) cam and heads no spray

    Our YOUTUBE CHANNEL featuring the Silverado

  2. #2
    Lifetime Member Boost's Avatar
    Join Date
    Dec 2006
    Posts
    1,506

    Default

    Well, I fixed it it was just a bad actuator (leaky diaphragm). And judging from my findings and lack of responses there isn't much in the way of monitoring it, it is a separate module with input from BCM also. Thanks anyway!
    '12 Caprice PPV 6.0 L77 - daily transportation
    8.7 @ 84 (1/8 mile) bolt-ons

    '02 Silverado RCSB 5.3 L59 - regularly street driven
    8.2 @ 86 (1/8 mile) stock cam and spray
    8.6 @ 84 (1/8 mile) cam and heads no spray

    Our YOUTUBE CHANNEL featuring the Silverado

  3. #3
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    28,403

    Default

    Boost thanks for posting.

    Yet another module... hmmm, with BCM involvement.

  4. #4
    Lifetime Member Boost's Avatar
    Join Date
    Dec 2006
    Posts
    1,506

    Default

    LOL, I am taking tons of GM training recently and they keep saying that additional modules are being added for "serviceability and reliability" (?)
    '12 Caprice PPV 6.0 L77 - daily transportation
    8.7 @ 84 (1/8 mile) bolt-ons

    '02 Silverado RCSB 5.3 L59 - regularly street driven
    8.2 @ 86 (1/8 mile) stock cam and spray
    8.6 @ 84 (1/8 mile) cam and heads no spray

    Our YOUTUBE CHANNEL featuring the Silverado

Similar Threads

  1. FI LS3 Corvette not passing readiness checks
    By Filmjay in forum Gen IV V8 Specific
    Replies: 5
    Last Post: March 1st, 2011, 09:54 AM
  2. Tuning a LS3 corvette
    By johnnoumea in forum Gen IV V8 Specific
    Replies: 5
    Last Post: December 27th, 2010, 01:08 AM
  3. Procharged E38 08 LS3 Vette??
    By kbracing96 in forum E37, E38 & E67 PFI ECM's
    Replies: 1
    Last Post: April 29th, 2008, 06:37 PM
  4. 2008 Corvette LS3 support added
    By GMPX in forum Gen IV V8 Specific
    Replies: 15
    Last Post: August 12th, 2007, 01:32 PM

Posting Permissions

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