Page 1 of 2 12 LastLast
Results 1 to 10 of 12

Thread: Odd tuning question 4 cyl

  1. #1
    New Member
    Join Date
    Aug 2020
    Posts
    6

    Default Odd tuning question 4 cyl

    Can the 5.9 computers be programmed to run a 4 cylinder engine?

    I have an ISB170 3.9 which uses the same injectors, rail pressure sensor, fca, etc. as the dodge/cummins 5.9. However it uses and industrial (J1939) protocol which no one programs. If I re-pinned the harness to connect to the dodge/cummins computer does the EFIlive have the capability to time the 4 cylinders appropriately? I know the industrial 3.9 and 5.9 use the same computer just different programs.

  2. #2
    Lifetime Member GMPX's Avatar
    Join Date
    Apr 2003
    Posts
    13,148

    Default

    EFILive supports the HD ECM's (eg the J1939 protocol).
    However there is many ECM types in the HD world (even though they might look the same), do you have an ECM or just looking for something suitable?
    I no longer monitor the forum, please either post your question or create a support ticket.

  3. #3
    New Member
    Join Date
    Aug 2020
    Posts
    6

    Default

    Thanks for the reply. Hmmm. All the forums I have read on this motor no one can program it other than minor changes (some inputs on/off, max rpm, etc.) How would I going about seeing what can be programmed with EFIlive (I attached picture of computer nameplate) ?
    No, I do not have a dodge/cummins ECM, I was just looking to go to it if it would work.
    Click image for larger version. 

Name:	computer.png 
Views:	221 
Size:	847.1 KB 
ID:	23458

  4. #4
    Lifetime Member GMPX's Avatar
    Join Date
    Apr 2003
    Posts
    13,148

    Default

    Is that the name plate from the actual ECM you will be dealing with? I have a feeling the ECM used on earlier 4cyl motors was the CM800, we don't support that one.
    But a simple answer is you really need to start with an ECM and calibration that was made for that engine, we certainly don't have enough parameters in the software to change from 6 to 4 cyl etc.
    I no longer monitor the forum, please either post your question or create a support ticket.

  5. #5
    New Member
    Join Date
    Aug 2020
    Posts
    6

    Default

    That is the nameplate on the existing 4 cyl computer. In Cummins quick serve it does have "CM800" listed with the information for my engine serial #. So it sounds like there is no way to program this engine. Can't program a CM800 and can't program from 6 to 4 cyl using a different ECM.

  6. #6
    Lifetime Member GMPX's Avatar
    Join Date
    Apr 2003
    Posts
    13,148

    Default

    Unfortunately it looks like that is the case, that is one of the few Cummins ECM's we don't support I'm afraid.
    I no longer monitor the forum, please either post your question or create a support ticket.

  7. #7
    New Member
    Join Date
    Aug 2020
    Posts
    6

    Default

    Thanks for replying. Is the reason for not supporting it demand or something to do with the ECM?

  8. #8
    Lifetime Member GMPX's Avatar
    Join Date
    Apr 2003
    Posts
    13,148

    Default

    Demand, we've had tuning for HD Cummins for maybe 2 to 3 years, yours is the first request for the CM800.
    I no longer monitor the forum, please either post your question or create a support ticket.

  9. #9
    New Member
    Join Date
    Aug 2020
    Posts
    6

    Default

    From visiting other forums (particularly 4btswaps) there are quite a few people looking for them and maybe a lot more that are looking but keep on reading that there is nothing so they don't ask/pursue further.

  10. #10
    Lifetime Member GMPX's Avatar
    Join Date
    Apr 2003
    Posts
    13,148

    Default

    In my experience if 20 people on a forum want something only 2 will actually buy it.
    I looked at the usual USA based wrecking yards we get Cummins ECM's from and these CM800's are non existent, they all seem to come from Europe or China.
    I no longer monitor the forum, please either post your question or create a support ticket.

Page 1 of 2 12 LastLast

Similar Threads

  1. P11 2.2 ECOTECH 4-cyl transplant tuning - issues with going rich at WOT
    By GR8GAME in forum IL4, 97-01 PCM and 02+ P11 PCM
    Replies: 0
    Last Post: November 26th, 2017, 01:20 PM
  2. G/cyl question
    By andysc3 in forum Custom Operating Systems
    Replies: 20
    Last Post: June 14th, 2013, 03:02 PM
  3. Odd swap feasability question.
    By LS1Inferno in forum E37, E38 & E67 PFI ECM's
    Replies: 2
    Last Post: February 8th, 2012, 02:41 PM
  4. Turbo LS4 odd dma grams/cyl problem with mass air on the dyno
    By MattS in forum Forced Induction and Nitrous Oxide (N20)
    Replies: 0
    Last Post: January 17th, 2011, 01:21 PM
  5. QUESTION ON CYL BALANCE TEST
    By tuff in forum General (Petrol, Gas, Ethanol)
    Replies: 12
    Last Post: July 6th, 2005, 01:24 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
  •