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Old 05-04-2013, 09:57 PM   #1
ZXthrizzle05
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throttle body to IM issue

so did a vac leak test today and theres LOTS of air coming from where the tb spring is to the intake manifold. I found out the top two screws for the tb to the IM aren't tightening all the way as well. wich could be the culprit for this. any ideas on how to fix this? italo and I have been back and forth all day I got two studs in so far but the issue still is there. driving home from my fathers the damn car bucks real bad when cruising


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Old 05-05-2013, 08:21 AM   #2
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If you have a tune and please done take this wrong , tell your tuner there is no Vac leaks the tune can adjust over the Vac leak (which can cause other issues) then when you find and fix a Vac leak it changes the fueling and can cause driveability issues , it just needs an adjustment in the fueling

Almost all TB leak some around the shaft they stopped putting good seals in the years ago so that is part of the calculation thats built into even the stock trims on a stock car , the bolts on the other hand not tightening up are an issue

Maybe tonight you can give me a call and I can better understand whats wrong and try to help

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Old 05-05-2013, 11:08 AM   #3
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I had a feeling my mis fires were being caused by vac leaks wich was why I spent all day yesterday trying to fix everything. the throttle body screws I believe are what causing itto leak since its not sealing all the way down to the manifold then
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Old 05-05-2013, 11:42 PM   #4
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I dont know if I think it is but we will see , either way needs to be fixed

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Old 05-06-2013, 12:08 AM   #5
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sent log just cruising
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Old 05-06-2013, 07:56 PM   #6
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What manifold?
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Old 05-06-2013, 08:04 PM   #7
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oem one
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Old 05-06-2013, 08:52 PM   #8
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are you using stock tb bolts? are they to long and bottoming out before they are tight?
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Old 05-06-2013, 09:10 PM   #9
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OEM is screws. Ever overtighten one? Strips the damn plastic right out.
Stupid design; and you can't do much to fix it.

I haven't looked but, can you drill through and use a bolt from the bottom with a nut on top? (kinda cumbersome but secure)
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Old 05-06-2013, 09:57 PM   #10
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you cant really drill through and put a nut a the bottom, right now the top two I put studs. it holds down but not the absolute super tightest. I figured out as well the aftermarket tb for our oem manifolds some reason don't like to fit absolutely 100% wich ahs been causing my leak, so I rtv the shit out of it along the outer edge
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