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Old Apr 6, 2021 | 10:49 AM
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I am having trouble with my 102 fast.everything seems to be good but it will run away,as soon as i get off the break and the wheels start to roll is will take off on its own,up to 35-40 mph.I have a tuner guy but he has never done a fast.what can it be?
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Old Apr 6, 2021 | 10:53 AM
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Oh yeah I am new to the LS,I have raced for 30 years and know the old school but am trying to learn this new stuff,

I have long tube headers,cam,head work,flat tops,cold air.and a little spray.410 gears
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Old Apr 6, 2021 | 05:27 PM
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What's your setup? Engine, throttle body (wire or cable?), any other mods?
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Old Apr 6, 2021 | 07:58 PM
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Close the throttle blade.
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Old Apr 6, 2021 | 09:22 PM
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Originally Posted by BigDaddyB
I am having trouble with my 102 fast.everything seems to be good but it will run away,as soon as i get off the break and the wheels start to roll is will take off on its own,up to 35-40 mph.I have a tuner guy but he has never done a fast.what can it be?
You answered your own question. It's the tune.

Have some one that knows what they are doing make the proper adjustments.
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Old Apr 8, 2021 | 08:21 AM
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i have and fluid checked it.did have to drill a hole in it just to get it to start.
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Old Apr 8, 2021 | 08:22 AM
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I am looking for one now,thanks
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Old Apr 8, 2021 | 12:08 PM
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Originally Posted by BigDaddyB
i have and fluid checked it.did have to drill a hole in it just to get it to start.
wait, you fluid checked the throttle body and then decided to drill a hole? Does that mean it passed absolutely no fluid when closed? I don't know how that's possible with a functioning throttle body. You need to step back and provide more details, but sounds like there may be a possibility your clearance is so tight the blade can't close when you let off the throttle.

But I'm just stabbing in the dark, you need to step back and provide details on the car, motor, symptoms, etc for this to be a helpful conversation.
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Old Apr 8, 2021 | 05:43 PM
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Drilling the blade is such a no no. The right tuner can get it all ironed out without any of those things done. Your fighting a loosing battle with IAC counts when you start doing that stuff. Just my knowledge....
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Old Apr 9, 2021 | 04:01 PM
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What brand TB? That could the issue. Nick Williams is hand down the best LS TB.
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Old Apr 15, 2021 | 07:05 AM
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Depending on whether its GEN 3 or 4 that hole is just another hurdle. Gen 3 will be fighting the IAC with that hole. Too much air and you will have trouble getting the throttle to idle down. Your issue is definitely the tune file. I would love to help you but I don't exactly understand what you are describing, nor do we know what ECU you are running.
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