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6nz driving me nuts!

Discussion in 'Trucks [ Eighteen Wheelers ]' started by shawn1972, Jun 19, 2014.

Page 3 of 4
  1. Jun 21, 2014 #21
    shawn1972

    shawn1972 Light Load Member

    57
    5
    Mar 23, 2014
    Madera Ranchos, CA
    0
    I have a factory restriction guage in the dash. It never gets over 2-3 in of vacuum. Been the same for the last 800000 mi. Been looking for a test ecm with no luck. Not to many caterpillars lefty running around out here with these bs emission laws.
     
    shawn1972, Jun 21, 2014
    shawn1972, Jun 21, 2014
    #21
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  3. Jun 21, 2014 #22
    shawn1972

    shawn1972 Light Load Member

    57
    5
    Mar 23, 2014
    Madera Ranchos, CA
    0
    And no smoke at start up. Just a little black when changing gears and cleans right up.
     
    shawn1972, Jun 21, 2014
    shawn1972, Jun 21, 2014
    #22
  4. Jun 21, 2014 #23
    wore out

    wore out Numbered Classic

    15,499
    187,161
    Jun 5, 2013
    CHASIN THE DEVIL'S HERD
    0
    That is the truth for sure. I didn't feel it was restriction but hate to over look the obvious. One other thought is did it start after an overhead. A new customer bought a new to him truck that had been all over with no help. The overhead was off bad but because the Dowell pin came out of the back of crank when the flywheel was removed to be surfaced. This allowed the flywheel to be installed in the wrong position. When pinned it wasn't at TDC. I would have thought CAT would have caught it but they are who actually set it wrong first after an injector replacement. It did idle rough sounded good with a few RPM but was sick in a pull. Just another little thought I still think the test ECM will confirm the problem.
     
    wore out, Jun 21, 2014
    wore out, Jun 21, 2014
    #23
    EverLuc Thanks this.
  5. Jun 21, 2014 #24
    shawn1972

    shawn1972 Light Load Member

    57
    5
    Mar 23, 2014
    Madera Ranchos, CA
    0
    #1 & #6 were at top dead center with engine pinned when I was doing overhaul. I had the jakes backed off to see if to see if that could be the problem. no luck. Just got done putting a oh kit in the jakes and checking the overhead. all seems to be fine. been checking grounds and added a few. no luck. anyone know of any good mechanics with a cat et or where the best place to get one new or used?
     
    shawn1972, Jun 21, 2014
    shawn1972, Jun 21, 2014
    #24
  7. Jun 21, 2014 #25
    shawn1972

    shawn1972 Light Load Member

    57
    5
    Mar 23, 2014
    Madera Ranchos, CA
    0
    What is needed to copy program in a 70 pin ecm and put into another?
     
    shawn1972, Jun 21, 2014
    shawn1972, Jun 21, 2014
    #25
  8. Jun 21, 2014 #26
    wore out

    wore out Numbered Classic

    15,499
    187,161
    Jun 5, 2013
    CHASIN THE DEVIL'S HERD
    0
    CAT ET is needed to do a configuration copy of the file. I would print it as well to do a line by line comparison when done. You don't actually remove the file from the old ECM but install it's latest version in the new ECM. CAT is required I think to use the latest version is the right way to say it I think.
     
    wore out, Jun 21, 2014
    wore out, Jun 21, 2014
    #26
  9. Jul 14, 2014 #27
    shawn1972

    shawn1972 Light Load Member

    57
    5
    Mar 23, 2014
    Madera Ranchos, CA
    0
    New cat ecm with stock 550 programing and still having this same issue. Can the fuel rail in head be checked with a leakdown tester to see if compression is blowing into fuel gallery? would it hold pressure with injectors in? Thanks.
     
    shawn1972, Jul 14, 2014
    shawn1972, Jul 14, 2014
    #27
  10. Jul 14, 2014 #28
    daf105paccar

    daf105paccar Road Train Member

    6,564
    7,293
    Apr 15, 2012
    0
    How much has all this allready cost you?
     
    daf105paccar, Jul 14, 2014
    daf105paccar, Jul 14, 2014
    #28
  11. Jul 14, 2014 #29
    shawn1972

    shawn1972 Light Load Member

    57
    5
    Mar 23, 2014
    Madera Ranchos, CA
    0
    Imore than i want to think about but a lot less than a new emissions pos truck!
     
    shawn1972, Jul 14, 2014
    shawn1972, Jul 14, 2014
    #29
  12. Jul 14, 2014 #30
    triplet08

    triplet08 Bobtail Member

    3
    0
    Jul 4, 2014
    0
    Shawn you sent me a pm but i don't have enough post to pmyou back. No i haven't found him yet though
     
    triplet08, Jul 14, 2014
    triplet08, Jul 14, 2014
    #30
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