Thread: cutting out under load and boost!!

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  1. #1 cutting out under load and boost!! 
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    car wouldn't start so i replaced the fuel pump and put more fuel in it and it runs good at idle. when i would hammer on it in neutral as soon as boost tried to build it would start cutting out and falling on its face.. so i found a vacuum hose disconnected put it back and now it only cuts out under load when the boost starts to build please help.. changed fuel filter right before the old fuel pump went out
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  2. #2 Re: cutting out under load and boost!! 
    The Boss Iceman6669's Avatar
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    Well, if it is only doing it UNDER LOAD, I would suggest checking the CAT. BUT if it is only doing it under BOOST AND LOAD, it might be a different problem.
    97 GTP Sold-prolly rusted away by now
    2011 F-150 Yote powered
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  3. #3 Re: cutting out under load and boost!! 
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    its a 99 gtp and the cat is gone.. could the fuel filter be plugged up again already?? and also are there any fuses or sensors or anything.. I'm so lost on this I'm a diesel guy lol
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  4. #4 Re: cutting out under load and boost!! 
    The Boss Iceman6669's Avatar
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    maybe a Cam sensor. OR bad ICM.
    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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  5. #5 Re: cutting out under load and boost!! 
    GXP Level Member darkhorizon's Avatar
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    Quote Originally Posted by Iceman6669 View Post
    maybe a Cam sensor. OR bad ICM.
    lol, neither of those would cause issues.

    Check your plugs/wires/coils.
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  6. #6 Re: cutting out under load and boost!! 
    The Boss Iceman6669's Avatar
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    Quote Originally Posted by darkhorizon View Post
    lol, neither of those would cause issues.

    Check your plugs/wires/coils.

    Really.... It is ok to have a bad Cam sensor and/or a bad ICM?
    97 GTP Sold-prolly rusted away by now
    2011 F-150 Yote powered
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  7. #7 Re: cutting out under load and boost!! 
    GrandPrix Junkie NegativeOne13's Avatar
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    Quote Originally Posted by Blowblackorgetback View Post
    when i would hammer on it in neutral
    Problem found. Whose cool... he's cool.

    And smile it's Blacktooth Grin!
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  8. #8 Re: cutting out under load and boost!! 
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    hey I'm not saying i was doing it to be cool i was just seeing if i could get it to cut out before i wasted my time to go drive it.. thanks to you other guys though.. and this all happen in one night keep in mind i parked it running just fine went out the next morning and bam wouldn't start and when i finally got it running after the new pump still running like crap... btw it rained the night all this happen I'm not sure if there was lightening or not if that would even make a difference also the plugs and wires are new
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  9. #9 Re: cutting out under load and boost!! 
    Moderator dsmuts's Avatar
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    You sure you arent just bouncing off the rev limiter?
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
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  10. #10 Re: cutting out under load and boost!! 
    Killa Bee Scottydoggs's Avatar
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    X2 these cars have 4,000 rpm rev limiter in park and neutral.

    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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  11. #11 Re: cutting out under load and boost!! 
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    Like I said it was doing it in neutral way before limiter and I got it fixed now it just goes to the limiter.. However under load it runs like total crap that's what I'm trying to figure out
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