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Thread: segment swap in COS5

  1. #1
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    Default segment swap in COS5

    Trying to do a fuel system segment swap to get my fuel gauge working on my 98 to 99+ pcm swap. Everything seems to be copying over fine, and all tables and parameters are changed back to my 98 info. But the gauge still isn't working, just stays maxed out. Is the problem that I needed to do the segment swap before going with a COS? Do I have to revert back to my original GM OS then segment swap, and then start over on my COS5? Thanks guys!

    Jeffrey
    '98 Z28 S475

  2. #2
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    I havent tried it, but the easiest thing to do would be to load your current COS file and try to compare it with the base file you need the fuel segment from. The base OS' must be the same (pre-COS upgrade file and source file), even then I dont know if the tune tool can do it. If you get a "cannot load calibration with alternate OS" or similar error, have to go back to the base file, seg swap it, then COS upgrade.
    ~Erik~
    2013 Sonic RS Manual - 1.4L I4T E78, starting the mods
    2008 TrailBlazer SS 3SS AWD Summit White - LS2 E67/T42, bolt ons, suspension, etc.
    2002 Chevy TrailBlazer LT 4X4 Summit White - 4.2L I6 P10, lifted, wheels, etc.

  3. #3
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    I don't get any errors, it says that it copies and loads over fine. I'm doing the standard 02 Express Van segment swap that everyone does, but must be missing something!
    '98 Z28 S475

  4. #4
    Joe (Moderator) joecar's Avatar
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    Try playing with the fuel level table, see if you can make the gauge move.

  5. #5
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    Nope, no dice. I scaled the table up and down by 50% and 150% and never saw a change in the needle reading full
    '98 Z28 S475

  6. #6
    Joe (Moderator) joecar's Avatar
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    What happens if you unplug the fuel level sender...?

  7. #7
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    Hmm, not sure. It's a '98 so I'll have to get under the car to pull that plug. Hopefully I'll have some free time tomorrow.
    '98 Z28 S475

  8. #8
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    Popped the plug off, the gauge doesn't move, stays maxed out.
    '98 Z28 S475

  9. #9
    Joe (Moderator) joecar's Avatar
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    What happens if you short the pin in the connector to ground...?

    ~ posted by phone ~

  10. #10
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    Still doesn't move when grounded. Ohms show 82.3, car has probably 1/3 tank in it. Are you thinking this might not be tune related since it seemed to load the segment swap?
    '98 Z28 S475

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