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[Z06] Ported throttle body issues

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Old May 7, 2016 | 11:53 AM
  #1  
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Default Ported throttle body issues

I purchased a ported throttle body from a forum member and just installed it. I haven't tried driving the car, just started it to check for leaks, and make sure it idles, etc.

When you first start the car, the rpms will shoot up to a little over 2000 then settle down to normal (in the 800's) and will idle essentially fine. When the fan kicks on or off, it will repeat that process once again.

Is this something the car will eventually "learn" and self correct, or something that can be corrected in the tune? I am going to be having 06 Monte of Diablosport do a tune for me, but that is remote and he won't be able to physically be with the car...I don't want to have to get a $500 dyno tune for a ported throttle body

Anyone else face this issue and get a solution?
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Old May 7, 2016 | 08:35 PM
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If its improperly ported it will idle hunt. The tune needs to be updated or the iac is blocked or bad.
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Old May 7, 2016 | 09:06 PM
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I didn't have any problems at all when I installed a ported TB on my C5Z.
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Old May 8, 2016 | 08:19 PM
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Originally Posted by skyavonee
I didn't have any problems at all when I installed a ported TB on my C5Z.
I finally got to drive the car, it now idles at 3000rpm and even higher with the a/c on. I guess the good news is I now have 2 forms of cruise control

Needless to say this thing will be coming off. $125 lesson learned and the last used part I put on the Z.
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Old May 8, 2016 | 09:05 PM
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If you do want a good ported TB, Lingenfelter offers porting for $95 + shipping:
http://www.lingenfelter.com/product/...l#.Vy_hnL7CYs4
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Old May 9, 2016 | 08:26 AM
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I'm not gonna bother at this point. It has put a bad taste in my mouth for little to no gain anyway.
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Old May 12, 2016 | 03:55 PM
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Lol don't give up - Ported TB is a proven mod.
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Old May 12, 2016 | 05:18 PM
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Originally Posted by skyavonee
If you do want a good ported TB, Lingenfelter offers porting for $95 + shipping:
http://www.lingenfelter.com/product/...l#.Vy_hnL7CYs4
thats a really good deal. thanks for the info
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Old May 27, 2016 | 07:50 AM
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Originally Posted by skyavonee
If you do want a good ported TB, Lingenfelter offers porting for $95 + shipping:
http://www.lingenfelter.com/product/...l#.Vy_hnL7CYs4
Edit: Received the throttle body today, and Lingenfelter did an absolutely amazing job on it. I have removed my previous post that I made out of frustration because I had been without my car for 2 weeks, but their work was fantastic, I installed it, car idled perfect. I haven't taken it out for a drive yet because it's like 100 degrees out, but I have no reason to believe I'll have the same issues as before.

Last edited by NosLaser; May 31, 2016 at 04:05 PM.
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Old May 28, 2016 | 09:24 PM
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Originally Posted by NosLaser
I purchased a ported throttle body from a forum member and just installed it. I haven't tried driving the car, just started it to check for leaks, and make sure it idles, etc.

When you first start the car, the rpms will shoot up to a little over 2000 then settle down to normal (in the 800's) and will idle essentially fine. When the fan kicks on or off, it will repeat that process once again.

Is this something the car will eventually "learn" and self correct, or something that can be corrected in the tune? I am going to be having 06 Monte of Diablosport do a tune for me, but that is remote and he won't be able to physically be with the car...I don't want to have to get a $500 dyno tune for a ported throttle body

Anyone else face this issue and get a solution?
Mine does the same thing but only when you first start it. Mine is also not ported, it is a tpis TB.
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