Thread: Maximum Injector Pulse width 2004 GTP L32

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  1. #1 Maximum Injector Pulse width 2004 GTP L32 
    SE Level Member chrisrexmandie's Avatar
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    I was wondering if anyone knew what the max pulse width is for the stock L32 injectors are? When running a scan my Injector duty cycle topped out at 113% but the pulse width had only a max of 22ms. I recall reading somewhere that there's a scaling issue either in the VCM scanner or the PCM its self when it comes to the injector pulse width. My car doesn't fall on its face or go lean when the injector pulse width goes over 100%. My AFR stays at a steady 11.0:1 and the upstream O2 sensor sits at 900mv even after the injectors "max out". Just looking for some information because I feel like i shouldn't be needing new injectors since I have the stock pulley. I also performed a Injector balance test and they all dropped key on fuel pressure the same amount.
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  2. #2 Re: Maximum Injector Pulse width 2004 GTP L32 
    Killa Bee Scottydoggs's Avatar
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    what mods you got? a 3.2 pulley will just about max out the stock injectors.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  3. #3 Re: Maximum Injector Pulse width 2004 GTP L32 
    SE Level Member chrisrexmandie's Avatar
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    I have the stock 3.8 pulley, cold air intake, 3 inch catless downpipe, Tune, autolite 104, 180stat
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  4. #4 Re: Maximum Injector Pulse width 2004 GTP L32 
    Killa Bee Scottydoggs's Avatar
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    your no wheres near maxing em out yet then.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  5. #5 Re: Maximum Injector Pulse width 2004 GTP L32 
    SE Level Member chrisrexmandie's Avatar
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    Thanks! its just weird to see the duty cycle so high.
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  6. #6 Re: Maximum Injector Pulse width 2004 GTP L32 
    GXP Level Member GTPpower's Avatar
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    Yeah it's not right. You can see pw in the 30's on 04+ cars.
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  7. #7 Re: Maximum Injector Pulse width 2004 GTP L32 
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    20ms is the max pulse with my scan tool shows when I shift to 2nd right before redline. If I waited any longer to tap shift 2nd gear I would hit the rev limiter
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