Thread: 1998 Silverado 5.7 issues

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  1. #1 1998 Silverado 5.7 issues 
    The Boss Iceman6669's Avatar
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    Ok Ive been having some issues with my dam truck recently. Heres what I know to be a fact, I am getting a P0300 code and only cyl 2 and 8 are showing miss fires. I have a new(ish) distributor, cap, rotor, plugs, and wires. I hooked HPT to it today and I am seeing that my LTFT and my STFTs look fine, along with what I would consider normal O2 readings. The one thing I saw that I thought was kinda odd was the Cam Retard timing. I was reading that it should be +/- 4* and I was seeing -15*. I am certainly going to correct that isssue. But my question is, would the CRT being off that much cause a miss fire on just those two cyl?


    Truck will start and drive. But runs like total ****. Idle its MEH, but once under load and given any throttle, it shakes REALLY bad and will barely accel. It literally happened while driving it, but I had been having hesitation issues for the past few weeks/months. Nothing major until this happened. If I rev it while in park or N, it "pings" in the exhaust.
    97 GTP Sold-prolly rusted away by now
    2011 F-150 Yote powered
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  2. #2 Re: 1998 Silverado 5.7 issues 
    Killa Bee Scottydoggs's Avatar
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    try the injector swap game yet? or this a tbi?

    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: 1998 Silverado 5.7 issues 
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    Quote Originally Posted by Scottydoggs View Post
    try the injector swap game yet?
    Well, funny you mention that. Spider Injectors are on the list of possible issues. BUT I aint rippin the intake off just to swap them around. If I take the intake off I will be replacing them all. And thats like $300 just in injectors. So I wanna explore all other options first.
    97 GTP Sold-prolly rusted away by now
    2011 F-150 Yote powered
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  4. #4 Re: 1998 Silverado 5.7 issues 
    Killa Bee Scottydoggs's Avatar
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    some how im sure you tested for vac leaks already? seems they all eat intake gaskets.

    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: 1998 Silverado 5.7 issues 
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    Yea Kinda?

    LTFTs looked ok and I sprayed the intake down with carb cleaner back in OCT. when I was having an issue with the cap and rotor.
    97 GTP Sold-prolly rusted away by now
    2011 F-150 Yote powered
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  6. #6 Re: 1998 Silverado 5.7 issues 
    Killa Bee Scottydoggs's Avatar
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    just looked up that spider swap, wtf were they thinking?

    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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  7. #7 Re: 1998 Silverado 5.7 issues 
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    No GD clue. Lol


    now you see why I wanna be 100% sure that’s the issue before I do it
    97 GTP Sold-prolly rusted away by now
    2011 F-150 Yote powered
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  8. #8 Re: 1998 Silverado 5.7 issues 
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    5.7 issues - YouTube



    Fixed the cam offset angle issue... But the truck still runs like dick.... Still have a miss on cyl 2 and cyl 8.
    97 GTP Sold-prolly rusted away by now
    2011 F-150 Yote powered
    Too Hot to Handle, Too Cold to Hold
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