Generation III Internal Engine 1997-2006 LS1 | LS6
Sponsored by:
Sponsored by:

Help hissing noise in throttle body

Thread Tools
 
Search this Thread
 
Old Oct 4, 2005 | 12:25 AM
  #1  
rama1r's Avatar
Thread Starter
Teching In
 
Joined: Feb 2005
Posts: 7
Likes: 0
Default Help hissing noise in throttle body

My 1999 ram air is making a hissing noise started making it after a vacum line that leads to the right side of the throttle body(passenger side) i replaced it but i still hear a hissing coming from the inside of the throttle body i took the air lid off and look down the throttle body.
cant figure it out
my car barley idles cuz of my cam but now it will not even stay running unless i keep the throttle up.
any help


thanks
Reply
Old Oct 4, 2005 | 04:54 AM
  #2  
WS6nJAX's Avatar
Restricted User
iTrader: (207)
 
Joined: Aug 2005
Posts: 555
Likes: 0
From: jacksonville, fl.
Default

you need to drill a hole in your throttle blade. it will help it idle smoothly.
Reply
Old Oct 4, 2005 | 09:06 AM
  #3  
89lx-ls1's Avatar
TECH Regular
iTrader: (23)
 
Joined: Jun 2005
Posts: 437
Likes: 0
From: TN
Default

Do you still have egr? my seal on my 99 didnt seat right and had a vacume leak and hissed pretty loud
Reply
Old Oct 4, 2005 | 09:22 AM
  #4  
chris2000ss's Avatar
12 Second Club
iTrader: (9)
 
Joined: Jan 2002
Posts: 742
Likes: 0
From: Morrisdale,PA=home & Asheville,NC=work
Default

you may need to drill the TB.did you get a computer tune ??if not I would suggest getting one.
Reply
Old Oct 4, 2005 | 10:01 AM
  #5  
Bad30th's Avatar
12 Second Club
iTrader: (13)
 
Joined: Nov 2001
Posts: 1,898
Likes: 0
From: San Diego, CA
Default

The hissing noise is probably the IAC opening all the way to try to let more air in. As suggested, drill out the hole - and I can't stress this enough - ONE BIT SIZE BIGGER AT A TIME and drive it for a day or two after each size increase.

Once you go too big it's difficult to make it smaller again.

This will keep the IAC from having to open so far, will help the hissing noise and will also help the drivability of the car a lot.

You will know you drilled it too big if you have a high idle, start setting P0121/TPS codes and have 'cruise control' coming to a stop.

Cheers,
Rob (Bad30th)
Reply




All times are GMT -5. The time now is 12:14 PM.

story-0
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-1
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-2
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-3
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-4
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-5
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-6
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-7
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-8
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-9
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE