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Old 08-06-2008, 12:24 PM   #1
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Need a little help, veterans/professionals.

I just bought a 98 wrangler w/ the edge performance kit already on it. Throttle body,intake, computer. This thing whistles in certain rpm ranges and is fluid w/ throttle control. My question is can i drill a small hole in the throttle body plate to cure this??? I know that was a fix on mustangs?

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Old 08-06-2008, 12:42 PM   #2
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What do you mean "fluid w/throttle control"? By throttle body plate, do you mean the butterfly valve that the accelerator pedal controls?

Incidentally, whistling TBs are not uncommon on TJs once they get screwed with or replaced with an aftermarket part.

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Old 08-06-2008, 01:20 PM   #3
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live with it. It's normall
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Old 08-06-2008, 01:28 PM   #4
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Originally Posted by Jerry Bransford View Post
What do you mean "fluid w/throttle control"? By throttle body plate, do you mean the butterfly valve that the accelerator pedal controls?

Incidentally, whistling TBs are not uncommon on TJs once they get screwed with or replaced with an aftermarket part.
By fluid i mean whistle is in relation to throttle? not sure how to word it.
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Old 08-06-2008, 01:29 PM   #5
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live with it. It's normall


Im sure there is some kinda of fix?
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Old 08-06-2008, 01:31 PM   #6
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yes butterfly valve in the TB. I know when upgrading/changing in mustangs we would sometimes drill a small hole into the plate itself and it would take away the whistle. i was curious if it worked in this application also?
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Old 08-06-2008, 09:20 PM   #7
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Old 08-06-2008, 10:11 PM   #8
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Thank you that's the useful information i was looking for.
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Old 08-06-2008, 10:18 PM   #9
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You are welcome also welcome to the WF!!!!
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Old 08-06-2008, 11:00 PM   #10
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Thank you ive been lurking for awhile, but apparently havent figured out the search feature completely. So i decided to ask. Ive contacted edge performance and waiting for a response? we'll see.
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Old 08-06-2008, 11:59 PM   #11
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mine does this quite frequently. i have the k&n fipk and a throttle body spacer. its normal. annoying sometimes, but you get used to it.
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Old 08-07-2008, 08:11 AM   #12
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I don't have either setup but I have worked on a few other makes with similar setups and I can't see this being normal.Yes you will get a mild wind whirl noise from the air forced through the intake chamber but an annoying whistle should not be normal.It has to be a rough edge on the port shown in the link I put up earlier or a sharp edge on the lip at the inlet or the butterfly itself.If it was normal and no way to repair it automotive companies would have ran into it by now and had new cars coming out that sound like a turbo going down the road in a non turbo car.
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Old 08-07-2008, 12:05 PM   #13
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The last thing I would do is to drill a hole in the butterfly valve. That will just totally screw your idle up and likely confuse the hell out of the computer.
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Old 08-07-2008, 12:12 PM   #14
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^ slf posted the needed info needed thanks. im waiting on edgeperformance to contact me if not i will do the mod myself.
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Old 08-08-2008, 03:21 AM   #15
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ugggh. well edge contacted me and told me about the above mod? i went ahead pulled the tb and beveled the edge. It did take alot of the whistling out but now my idle is 1,500-2,000??? i had the battery unhooked for awhile to maybe reset something? who knows?
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Old 08-08-2008, 09:36 AM   #16
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did you plug the IAC back in.
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Old 08-08-2008, 09:51 AM   #17
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They had you do it yourself???I thought they had you to send it to them and they fixed it and sent it back????See if the IAC has an adjustment on it some of them you can loosing the screws and twist it one way or the other and tighten back down to increase or decrease the idle.Not sure on the Jeep if so the top and bottom screw holes on the IAC will be oblonged instead of just a round hole.
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Old 08-08-2008, 10:10 AM   #18
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The IAC has no adjustment on it. If you ground the butterfly valve so it is no longer air tight at idle, that's why your rpms are now higher. I can't IMAGINE why someone would have told you to bevel it. At idle, the IAC is supposed to be the only source of air into the engine and by beveling the butterfly valve, your engine now has two sources of air which means it won't idle at the rpms the computer is trying to achieve.
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Old 08-08-2008, 05:38 PM   #19
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37x12.50x17 Pro Comp Mud on 17" Pro Comp Steels

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Old 08-22-2008, 01:10 AM   #20
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Well i beveled the port, with no luck. contacted edge again. they sent me a brand new throttle body w/a prepaid shipper label for mine Works perfect w/zero whistle and perfect idle. They really do have outstanding customer service. especially since i bought the jeep w/the kit on it, and they know i wasnt the original owner of the kit! Many kudo's to edge performance!!!!
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Old 08-22-2008, 07:01 AM   #21
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Glad to hear that you got all the issues worked out! Good to hear of a company with great customer service.

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