Bringing TBI and Multi Port Fuel Injection to a New Level.     EFI Conversions and Tuning! Seattle to Portland! E-mail Tuning Consultant!
Results 1 to 2 of 2

Thread: 7165 ECM only communicates when cold

  1. #1
    Carb and Points!
    Join Date
    Apr 2013
    Age
    50
    Posts
    5

    7165 ECM only communicates when cold

    Not into tuning yet, still just becoming familiar with reading scan data.

    The problem is: All is good at startup, but after idling for about 10 minutes, communication with 7165 ECM is lost. I would surmise that this is a heat related problem with the ECM.

    Car runs good, both cold and warm.

    Any suggestions on what to check or repair would be welcomed.

    Thanks!

  2. #2
    Fuel Injected!
    Join Date
    Sep 2012
    Posts
    125
    The 7165 ECM is well known for stopping communication after a few minutes. I have the same ECM and have replaced it more than once in an attempt to resolve this issue with no luck. I have times when I can run log datalogs without it stopping and other times I don't get moving good before it stops. I don't think it has anything to do with heat.
    You should be able to shut off the engine for a minute or so then restart and it should work, at least it does for me, but who knows how long it will work before you have to reset again.

Similar Threads

  1. How to make it 'rev up' upon cold start 7747
    By Blake in forum GM EFI Systems
    Replies: 29
    Last Post: 01-22-2013, 10:02 PM
  2. Burst knock support in 7165/$6E calibration?
    By brianko in forum GM EFI Systems
    Replies: 1
    Last Post: 11-22-2012, 09:35 AM
  3. Ultra rich at cold start???
    By jameslleary in forum GM EFI Systems
    Replies: 25
    Last Post: 11-20-2012, 05:35 AM
  4. RT tuning a 7165 $6E Camaro, sanity check please
    By brianko in forum GM EFI Systems
    Replies: 8
    Last Post: 11-10-2012, 08:11 PM
  5. 1993 Corsica 2.2 liter Stalling when cold
    By historystamp in forum Gear Heads
    Replies: 25
    Last Post: 01-19-2012, 02:04 PM

Bookmarks

Posting Permissions

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