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Thread: 5.3 Injector Flow Rate

  1. 11-14-2003 04:02 AM #1
    49Stude
    49Stude is offline Junior Member
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    Can anyone tell me what the flow rate is on a stock '99 5.3 injector? Also, what fuel pressure do these engines run?

    Thanks!
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  2. 11-14-2003 06:28 AM #2
    L82gofast
    L82gofast is offline Senior Member
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    I think they are 24# and the truck fuel press spec is 55 - 59psi. I'm sure someone can correct me if that's wrong.
    '02 1500HD, 6.0L, magnacharger, 2000stall, custom magnaflow with electric cutout, E-fans, Nelson custom tune, Auburn LSD.
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  3. 11-14-2003 01:49 PM #3
    twobit
    twobit is offline Senior Member
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    99 injectors are about 21# 2000 and up are 24#
    02 Silverado
    02 TrailBlazer
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  4. 11-14-2003 05:30 PM #4
    49Stude
    49Stude is offline Junior Member
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    Great, thanks a lot!
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