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Thread: LS1 no injector firing?

  1. #16
    RIP EagleMark's Avatar
    Join Date
    Feb 2011
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    North Idaho
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    Kind of strange the Pink/Black wire not having 12 volts at key on was a easy find, but in this case not the issue, it should be 0 volts. But also pointed me in right direction as Pin A and B were switched qot Cam Position sensor.

    Now we have noid lights!

    Just no fuel? Owner was at dyno shop and suspected a fuel plumbing issue with his fuel cell with in tank pump and the corvette filter regulator... switched a couple lines and VVVVRRRROOOOMMM! Fired right up!

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  2. #17
    Fuel Injected!
    Join Date
    Apr 2013
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    121
    Awesome !!! ... and in the customer's eyes you are his saviour !

  3. #18
    RIP EagleMark's Avatar
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    Feb 2011
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    North Idaho
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    I do enjoy these challenges and I learn more and more each time I get involved in a mix match of parts, harness, PCM etc... a lot has to do with my support group here! seeing joy in there eyes at the end is very reward-able!

    But the first dyno run only put down 350 HP and about same torque, so not the joy I was looking for? I already had injector data and MAF data in cal, but not much else other then turning off auto trans...

    Four more pulls from 3000 to 5500 RPM were it went flat at 415 HP and started to drop at 6000 RPM... torque peak was 426 ft lb at 4200! Now there was joy in his eyes!

    He and the dyno/engine builder shop owner were very happy with numbers and especially with idle... I told them I had not worked on that yet but will make it idle nice tomorrow!

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

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