Generation III External Engine LS1 | LS6 | Bolt-Ons | Intakes | Exhaust | Ignition | Accessories
Sponsored by:
Sponsored by:

TB question

Thread Tools
 
Search this Thread
 
Old Feb 28, 2009 | 09:55 PM
  #1  
redlineracing's Avatar
Thread Starter
TECH Regular
iTrader: (1)
 
Joined: Jan 2009
Posts: 488
Likes: 0
From: Northwest, Indiana
Default TB question

Hey guys.

Had my throttle body ported by a forum sponser here. I installed it today.

The problem it, the car now idles a little higher than usual. I dont think the butterfly is closing all the way. It also takes a little longer to get to idling RPM's after you press the gas. Is this anything to be concerned about?

Thanks alot.

-Lucas
Reply
Old Mar 1, 2009 | 12:07 AM
  #2  
01ssreda4's Avatar
TECH Senior Member
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (96)
 
Joined: Aug 2007
Posts: 24,241
Likes: 89
From: Turnin' Wrenches Infractions: 005
Default

does it have the bumpstop mod done? my ported idled funny for a couple trips when i first put it on there. i did the bumpstop mod later and it started idling funny again...kinda like what you describe.
Reply
Old Mar 1, 2009 | 01:11 AM
  #3  
quikrnmost's Avatar
Staging Lane
 
Joined: Jul 2008
Posts: 71
Likes: 0
From: Denver, CO
Default

The TB has too much air getting past the blade. You can try adjusting the idle screw on the side, but I bet it won't help. The TB has been ported too much around the blade. A good way to test this is to put a piece of tape over the hole on the blade. I bet you a 6 pack it will fix it. You need to weld or epoxy that hole up or get a C5 blade that doesn't have a hole in it.
Reply
Old Mar 1, 2009 | 01:17 AM
  #4  
thunderstruck507's Avatar
11 Second Club
iTrader: (18)
 
Joined: Mar 2008
Posts: 8,358
Likes: 27
From: Northwest AR
Default

if you hold the tb up to light can you see around the blade?
Reply
Old Mar 1, 2009 | 02:21 AM
  #5  
nemss1's Avatar
12 Second Club
 
Joined: Jun 2008
Posts: 2,585
Likes: 3
From: Edmond, OK
Default

may be over-ported and air is getting around the edges of the blade. also knife-edging the blade, i wouldnt recommend because of this
Reply
Old Mar 1, 2009 | 11:36 AM
  #6  
redlineracing's Avatar
Thread Starter
TECH Regular
iTrader: (1)
 
Joined: Jan 2009
Posts: 488
Likes: 0
From: Northwest, Indiana
Default

Well is this a problem? Is there any performance lost or is it just the funny idle?
Reply
Old Mar 1, 2009 | 01:14 PM
  #7  
redlineracing's Avatar
Thread Starter
TECH Regular
iTrader: (1)
 
Joined: Jan 2009
Posts: 488
Likes: 0
From: Northwest, Indiana
Default

Anybody? Come on guys, I need some help.

I don't mind the higher idling RPM's if there is nothing for me to worry about..
Reply
Old Mar 1, 2009 | 03:14 PM
  #8  
quikrnmost's Avatar
Staging Lane
 
Joined: Jul 2008
Posts: 71
Likes: 0
From: Denver, CO
Default

Originally Posted by redlineracing
Anybody? Come on guys, I need some help.

I don't mind the higher idling RPM's if there is nothing for me to worry about..

Come one? You got the advice you needed to fix it. Did you try putting tape over the hole? Try it and report back.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

 Brett Foote
story-1

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

 Pouria Savadkouei
story-2

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

 Verdad Gallardo
story-3

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-4

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-5

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-6

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-7

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-8

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-9

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
Old Mar 1, 2009 | 07:48 PM
  #9  
Sgt Drags's Avatar
Staging Lane
 
Joined: Apr 2008
Posts: 62
Likes: 0
From: Ft. Stewart, GA
Default

When I installed my ported T/B from revxtreme, it idled higher than normal. Reason being was that they gave me a t/b off of a 98 Camaro. The difference was in the cam on the side of the throttle body was a little bit smaller than on a 2001 camaro throttle body.
If you have both throttle bodies, you might want to check and make sure the cams are the same size on both throttle bodies.
Reply
Old Mar 1, 2009 | 08:13 PM
  #10  
quikrnmost's Avatar
Staging Lane
 
Joined: Jul 2008
Posts: 71
Likes: 0
From: Denver, CO
Default

Originally Posted by Sgt Drags
When I installed my ported T/B from revxtreme, it idled higher than normal. Reason being was that they gave me a t/b off of a 98 Camaro. The difference was in the cam on the side of the throttle body was a little bit smaller than on a 2001 camaro throttle body.
If you have both throttle bodies, you might want to check and make sure the cams are the same size on both throttle bodies.
That shouldn't affect the idle. The 00+ throttle cables are longer and with the shorter length of the 98-99's, the cable would have been longer than needed. So there should have been slack in the cable.

Now if you have a 98 and tried to install a 00+ throttle body, the cable would be too short and wouldn't allow the blade to close completely, creating a serious problem.
Reply
Old Mar 1, 2009 | 08:16 PM
  #11  
redlineracing's Avatar
Thread Starter
TECH Regular
iTrader: (1)
 
Joined: Jan 2009
Posts: 488
Likes: 0
From: Northwest, Indiana
Default

Ok guys. thanks for all the responses.

I was thinking about it today and I had a feeling it was the IAC. I went out and checked it, and the o-ring didnt seat properly. I reseated it and no more problem!
Reply




All times are GMT -5. The time now is 02:17 PM.

story-0
6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

Don't get dad new socks or a grill brush this year.

By Brett Foote | 2026-06-09 14:55:56


VIEW MORE
story-1
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-2
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-3
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-4
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-5
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-6
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-7
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-8
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-9
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