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Old 03-01-2017, 02:37 PM   #1
Matt2ls
 
Drives: 2015 2ls, tune, MRT v2, coldairind
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Overkill 80mm throttle body loud winning noise

I just recently put on an over kill 80mm throttle body, when I turned the car on after finishing my rpms were jumping from 400 to up to 1250 almost stalling out I figured the car was learning to the new air flow. I took a quick little test drive and the car was running a little bit off I was thinking it's just gonna take a little for the car to learn to the throttle body. Yesterday I went for a longer drive and I noticed the throttle body makes a very very loud whining noise that I can hear over the music, it is not all the time only at a certain opening point of the throttle body does it make this whining noise. I'm 19 tried to show my dad the sound as he knows much more than me and he couldn't hear it at all. The sound is beyond annoying to me I'm wondering if anyone else has this problem and still to today at a red light or in park the rpms are almost stalling out then bouncing up to about 1200 rpms. any suggestions? I know I can try to talk to will but it already took over a month of waiting to get the throttle body
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Old 03-01-2017, 03:11 PM   #2
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The erratic idle is probably a sign of a vacuum leak. I'd look closely at the spot where the TB meets the intake. Did you tighten those bolts in a uniformed manner? There needs to be even pressure on whatever gasket is inbetween those two in order to have a good seal.

The whine is a known artifact that some have experienced with the 80mm.
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Old 03-01-2017, 03:42 PM   #3
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OP - I have the exact same car and TB... 2015 2LS...

Have the whine with mine as well. Glad to hear you have it, no offense!

Will has stated this is normal.

Have not experienced the erratic idle that you describe tho. I'm guessing these issues are not related.

Keep us posted on what you find out...
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Old 03-01-2017, 04:10 PM   #4
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Sounds like you have gasket sealing problem issue. I had a slight erratic idle, but not as bad as yours sounds like. After 150-200 miles she smoothed out and purrs like a kitten now, nice and smooth. Check out your TB to manifold seal , I bet you have a leak.
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Old 03-01-2017, 05:37 PM   #5
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And don't over tq those bolts! easy strip and if that happens it'll never seal..good luck!
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Old 03-01-2017, 06:01 PM   #6
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Was showing the problem to my father and the car fully stalled out, we are taking the throttle body off and going to try putting it on again for hopefully different results but from what he saw It shouldn't have been leaking air to begin
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Old 03-01-2017, 06:09 PM   #7
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Just finished, tightened it down much harder than last time and the car is idling perfect not moving at all, seems to be all good now
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Old 03-01-2017, 06:16 PM   #8
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Alright! Go enjoy, but don't get a ticket! Haha
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Old 03-01-2017, 06:27 PM   #9
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Sadly I'm back where I started after 1 min, everything was idling perfect backed out of drive way shot the stabilitrak signal, whole car started sounding super clunky and stalled out, restarted the car barely got back into driveway. And have the engine light on now, and seems like everything is much worse now
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Old 03-01-2017, 06:51 PM   #10
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Sounds like a crazy thought here,but try this
Did you happen to maybe get the wires mix up?
From the throttle body and the C.A.I. mass air sensor
It almost happen to me when I put in my Vmax T.B. Got into a hurry and could not figure out why the wires could not reach the M.A.S. I laugh at myself got it altogether correctly. A few days went by . Next thing I did start to get a whine noise. So I check my connection of the C.A.I elbow on my K&N. Look fine on top but the elbow came loose on the bottom. With that being said I went, and unscrewed everything from the C.A.I tubing to the T.B. Then made sure everything was done slowly and retighten down correctly. Fix my issue that you seem to be having now .
Hope it helps somehow for ya.. Good Luck
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Old 03-02-2017, 01:49 PM   #11
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the hose from air intake to intake manifold had a leak in the back close to the intake manifold got it fixed and everything is running perfect
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Old 03-02-2017, 05:10 PM   #12
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Quote:
Originally Posted by Matt2ls View Post
the hose from air intake to intake manifold had a leak in the back close to the intake manifold got it fixed and everything is running perfect
YAY!!
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Old 03-03-2017, 02:16 AM   #13
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Still whine?
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Old 03-08-2017, 01:52 PM   #14
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Quote:
Originally Posted by sspade View Post
Still whine?
yes still there very annoying to me but love the power from the throttle body so I'm dealing with it
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