Thread: No Throttle response after IC install?

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  1. #1 No Throttle response after IC install? 
    GrandPrix Junkie SDGTP99's Avatar
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    Just installed the ZZP St2 IC core & for some reason I barely get any throttle response. Car's running fine, no leaks. The pedal feels loose & I have to push halfway down just to get a response...what the eff?
    OverKilled, HAI, Ported Throttle body, Ported intake, ZZP DP, Magnaflow, BMR ta's, GMPP STB's, CCS springs, tinted tailights, roof rails, TEP cool'r, G8 hood. Glass Gearbox.
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  2. #2 Re: No Throttle response after IC install? 
    Perma-Banned! JK LOL Explicit_Spade's Avatar
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    Did you forget to hook the throttle cable back up?
    Quote Originally Posted by W-Body Store
    Remember, GM engineers didn't take into account your need for speed.
    Daily Driver: 06 Grand Prix GT / 9.4:1 CR / IS3 Heads / Ported Gen V / ZZP Headers / HPT Pro / Pulleys: 4.25, 3.8, 3.5, 3.4, 3.2, 3.0, 2.9, 2.7
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  3. #3 Re: No Throttle response after IC install? 
    GrandPrix Junkie SDGTP99's Avatar
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    they are very hooked up.
    OverKilled, HAI, Ported Throttle body, Ported intake, ZZP DP, Magnaflow, BMR ta's, GMPP STB's, CCS springs, tinted tailights, roof rails, TEP cool'r, G8 hood. Glass Gearbox.
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  4. #4 Re: No Throttle response after IC install? 
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    The car runs great. It's just...I hafta push the pedal down a lot farther than I used to to get the car to move. Its really odd. Could moving the throttle body up 2.25" make the throttle cables loose enough that it affects throttle response? Or is it something else?
    OverKilled, HAI, Ported Throttle body, Ported intake, ZZP DP, Magnaflow, BMR ta's, GMPP STB's, CCS springs, tinted tailights, roof rails, TEP cool'r, G8 hood. Glass Gearbox.
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  5. #5 Re: No Throttle response after IC install? 
    DUI BABY Bio248's Avatar
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    make sure your cables are nice and tight. make sure the throttle blade moves smoothly. make sure the cables move smoothly.

    you gotta help us out here, help us diagnose.
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  6. #6 Re: No Throttle response after IC install? 
    Perma-Banned! JK LOL Explicit_Spade's Avatar
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    Quote Originally Posted by Bio248 View Post
    make sure your cables are nice and tight.


    Madonna - Like A Virgin (video) - YouTube
    Quote Originally Posted by W-Body Store
    Remember, GM engineers didn't take into account your need for speed.
    Daily Driver: 06 Grand Prix GT / 9.4:1 CR / IS3 Heads / Ported Gen V / ZZP Headers / HPT Pro / Pulleys: 4.25, 3.8, 3.5, 3.4, 3.2, 3.0, 2.9, 2.7
    Projects: 86 Monte Carlo SS / 98 Sonoma / 74 Honda CB750
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  7. #7 Re: No Throttle response after IC install? 
    GrandPrix Junkie SDGTP99's Avatar
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    I tightned the cables. That should do it.
    OverKilled, HAI, Ported Throttle body, Ported intake, ZZP DP, Magnaflow, BMR ta's, GMPP STB's, CCS springs, tinted tailights, roof rails, TEP cool'r, G8 hood. Glass Gearbox.
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  8. #8 Re: No Throttle response after IC install? 
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    Nope didn't make a difference. For some reason I now only get 40% throttle. And that's with the pedal smashed to the floor. Could it be a TPS issue? I'm kinda stumped.
    OverKilled, HAI, Ported Throttle body, Ported intake, ZZP DP, Magnaflow, BMR ta's, GMPP STB's, CCS springs, tinted tailights, roof rails, TEP cool'r, G8 hood. Glass Gearbox.
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  9. #9 Re: No Throttle response after IC install? 
    Perma-Banned! JK LOL Explicit_Spade's Avatar
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    Did you tighten it or loosen it?
    Quote Originally Posted by W-Body Store
    Remember, GM engineers didn't take into account your need for speed.
    Daily Driver: 06 Grand Prix GT / 9.4:1 CR / IS3 Heads / Ported Gen V / ZZP Headers / HPT Pro / Pulleys: 4.25, 3.8, 3.5, 3.4, 3.2, 3.0, 2.9, 2.7
    Projects: 86 Monte Carlo SS / 98 Sonoma / 74 Honda CB750
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  10. #10 Re: No Throttle response after IC install? 
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    Quote Originally Posted by Bio248 View Post
    make sure your cables are nice and tight. make sure the throttle blade moves smoothly. make sure the cables move smoothly.

    you gotta help us out here, help us diagnose.
    Okay okay. Everythang seems nice n' tawght tharr. Throttle responds fine when I pull the throttle bracket. Responds like Pooh when I push the pedal. I mean 40% max?
    OverKilled, HAI, Ported Throttle body, Ported intake, ZZP DP, Magnaflow, BMR ta's, GMPP STB's, CCS springs, tinted tailights, roof rails, TEP cool'r, G8 hood. Glass Gearbox.
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  11. #11 Re: No Throttle response after IC install? 
    DUI BABY Bio248's Avatar
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    either the cable has a balls ton of slack or your TPS sensor is way off and needs adjusting.
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  12. #12 Re: No Throttle response after IC install? 
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    The TPS is relatively new but it hasn't been messed with recently. So then, I must be overlooking slack somewhere?
    OverKilled, HAI, Ported Throttle body, Ported intake, ZZP DP, Magnaflow, BMR ta's, GMPP STB's, CCS springs, tinted tailights, roof rails, TEP cool'r, G8 hood. Glass Gearbox.
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  13. #13 Re: No Throttle response after IC install? 
    Donating User Swiggles's Avatar
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    theres a TPS relearn that you can do. i think its with car off but in the run position, you put the gas pedal to the floor 3 times in a row and that does it. you should search for it though because im not positive thats the procedure.

    the other thing, is you hood hitting the cable bracket when you close the hood? when the bracket goes up it might be hitting the hood and getting stuck. you can bend the bracket a little and then adjust your cables again or take the pad off the hood to give you more clearance.
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  14. #14 Re: No Throttle response after IC install? 
    GT Level Member RegalGS98s's Avatar
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    Have someone sit in the car and slowly push the pedal. Look under the hood while they're doing that and see if the throttle moves.
    SMGPFC #0330 - 3.25, Intercooled, Custom Tune, 1.84rr, LS6 Springs, roller timing chain, SLP Headers, Borla Exhaust, built Trans, B&M Trans Cooler, home cut poly uppers, gapless rings, N* TB, Ported heads.
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  15. #15 Re: No Throttle response after IC install? 
    GrandPrix Junkie SDGTP99's Avatar
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    I'll do that & check to see if the throttle cables are catching on the hood. It's a pretty tight squeeze to shut the hood now & many parts are rubbing. I just nvr thought to check the cables for rubbing/catching.
    OverKilled, HAI, Ported Throttle body, Ported intake, ZZP DP, Magnaflow, BMR ta's, GMPP STB's, CCS springs, tinted tailights, roof rails, TEP cool'r, G8 hood. Glass Gearbox.
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  16. #16 Re: No Throttle response after IC install? 
    GTX Level Member OH4CompG's Avatar
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    When you push the pedal to the floor is the throttle blade actually opening up all the way? Can you take pictures of your throttle cable where it attaches? I think you have it in the wrong spot.
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  17. #17 Re: No Throttle response after IC install? 
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    Erhm....I found the problem. Throttle cable wasn't attatched properly(I put it back together in the dark lol). Problem was deff' user fail
    OverKilled, HAI, Ported Throttle body, Ported intake, ZZP DP, Magnaflow, BMR ta's, GMPP STB's, CCS springs, tinted tailights, roof rails, TEP cool'r, G8 hood. Glass Gearbox.
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