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Thread: Fuel level gauge issue after tune...

  1. #1
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    Default Fuel level gauge issue after tune...

    Hi everyone,

    New to the forum, and had a fuel gauge question. I have done a search and come up with nothing.
    The car is a `93 Camaro, with and 2000 LS1 swap with ECU, harness, fuel tank, Walbro 255lph pump, OEM fuel level sending unit, ect. The motor has been completely built, now a 402 cid, with cam, rockers, manifold, LSA 52lbs/hr injectors, adjustable fuel pressure regulator, and so on. The instrument cluster is out of a `97 and has been wired for the fuel level, and have done the fuel segment swap.
    Anyway on to the question, the fuel gauge had been working properly giving accurate readings without any problems. The car was then dyno tuned, to where the ECU was converted to speed density from MAF and other obvious adjustments had been made. Since the tune the fuel gauge is now pegged on empty, up against the needle stop with the ignition on, and starts to move up with the engine running, but not even close to the correct fuel level. I have checked to see if the correct fuel segment is still in place, to which it is. Other then that the car runs perfectly, but the gauge issue is bugging me. I hope this is clear enough to understand, if anybody needs any more info please feel free to ask.

    Any help would be greatly appreciated.

    Thanks in advance,
    Giancarlo

  2. #2
    Lifetime Member ChipsByAl's Avatar
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    Are you able to scan the car with EFI_Live?
    Al
    "Trash that carb and get Injected!"

  3. #3
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    Yes, I am and I have. Is there something in particular I should be looking for? When I do, do a scan I'm not getting any fault codes.

    Thanks for your reply!
    Giancarlo

  4. #4
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    Can you post the tune?

    Also is it possible one of the wires might have chaffed and had the insulation worn off? Does it move in relation to speed, RPM, TPS, etc?
    ~Erik~
    2013 Sonic RS Manual - 1.4L I4T E78, tuned, turbo mods, etc.
    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.

  5. #5
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    Hi Guys,

    Sorry had completely forgotten about this post, and haven't worked on the car since. The gauge does not change at different RPM’s, speeds, or anything like that.

    How do I upload the tune?

    Thanks!
    Giancarlo

  6. #6
    Joe (Moderator) joecar's Avatar
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