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

feels laggy after header install

Thread Tools
 
Search this Thread
 
Old Mar 30, 2011 | 08:54 AM
  #1  
GTAWS6Brah's Avatar
Thread Starter
Staging Lane
10 Year Member
Liked
 
Joined: Mar 2011
Posts: 65
Likes: 3
Default feels laggy after header install

my ws6 feels laggy since i put on pacesetter lts with a tsp y-pipe. is it because of the 2 o2 sensors that are no longer connected? or is it because it needs to be tuned? its connected to an slp lm and sounds great with open throttle.
Reply
Old Mar 30, 2011 | 09:09 AM
  #2  
shepss217's Avatar
TECH Enthusiast
iTrader: (5)
 
Joined: Feb 2009
Posts: 574
Likes: 0
Default

did you mess with your throttle cable at all while working up top?
Reply
Old Mar 30, 2011 | 09:12 AM
  #3  
GTAWS6Brah's Avatar
Thread Starter
Staging Lane
10 Year Member
Liked
 
Joined: Mar 2011
Posts: 65
Likes: 3
Default

i didnt install it but idk why that would need to be messed with.
Reply
Old Mar 30, 2011 | 09:21 AM
  #4  
MillerTime85's Avatar
TECH Regular
iTrader: (8)
 
Joined: Oct 2009
Posts: 413
Likes: 0
From: Florida
Default

If the back O2 sensors are not connected you either need O2 sims plugged in them or a tuner to tune them out
Reply
Old Mar 30, 2011 | 09:27 AM
  #5  
1998flamedCamaro's Avatar
11 Second Club
iTrader: (4)
 
Joined: Jan 2006
Posts: 233
Likes: 0
From: manchester, KY
Default

Originally Posted by shepss217
did you mess with your throttle cable at all while working up top?
He is stating that the throttle cable could of accidently been hit or nudged and the tb blade is no longer opening all the way up when u go wide open throttle.

Have someone go in the car and press the the accelerator wide open and u look under the hood and verify it is hitting the bump stop.

Originally Posted by MillerTime85
If the back O2 sensors are not connected you either need O2 sims plugged in them or a tuner to tune them out
This will have no effect on performance it will just set a check engine light.


Make sure all spark plugs are not cracked/broken. Also make sure all wires are secure on the plugs and coils.
Reply
Old Mar 30, 2011 | 11:00 AM
  #6  
luxexpress1's Avatar
Staging Lane
 
Joined: Nov 2003
Posts: 55
Likes: 0
From: syracuse, ny
Default

Mine felt laggy also after I put header on until I installed a converter and did some tuning. Not sure if yours is an automatic, but if so, once you put a converter in it will really wake up.
Reply
Old Mar 30, 2011 | 12:03 PM
  #7  
CrazyDrivinJoe's Avatar
Staging Lane
iTrader: (1)
 
Joined: Feb 2010
Posts: 76
Likes: 0
From: Leominster, MA
Default

I lost power on mine after my header install on the bottom end gained up top but I havent been tuned yet it is running rich I am pretty sure thats y
Reply
Old Mar 30, 2011 | 03:20 PM
  #8  
GTAWS6Brah's Avatar
Thread Starter
Staging Lane
10 Year Member
Liked
 
Joined: Mar 2011
Posts: 65
Likes: 3
Default

Originally Posted by luxexpress1
Mine felt laggy also after I put header on until I installed a converter and did some tuning. Not sure if yours is an automatic, but if so, once you put a converter in it will really wake up.
mines an m6

Originally Posted by CrazyDrivinJoe
I lost power on mine after my header install on the bottom end gained up top but I havent been tuned yet it is running rich I am pretty sure thats y
yeah the bottom end is where i'm noticing the loss of power. i feel like im probably running rich too.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

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

 Pouria Savadkouei
story-1

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

 Verdad Gallardo
story-2

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-3

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

 Verdad Gallardo
story-4

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

 Pouria Savadkouei
story-5

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

 Verdad Gallardo
story-6

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-7

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-8

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-9

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
Old Mar 30, 2011 | 03:21 PM
  #9  
GTAWS6Brah's Avatar
Thread Starter
Staging Lane
10 Year Member
Liked
 
Joined: Mar 2011
Posts: 65
Likes: 3
Default

Originally Posted by 1998flamedCamaro
He is stating that the throttle cable could of accidently been hit or nudged and the tb blade is no longer opening all the way up when u go wide open throttle.

Have someone go in the car and press the the accelerator wide open and u look under the hood and verify it is hitting the bump stop.



This will have no effect on performance it will just set a check engine light.


Make sure all spark plugs are not cracked/broken. Also make sure all wires are secure on the plugs and coils.
the mechanic said i needed new plugs soon. it was fine driving to the mechanics though, i even put an RX-8 in its place.
Reply
Old Mar 30, 2011 | 03:30 PM
  #10  
TImmy_Jones's Avatar
TECH Fanatic
iTrader: (4)
 
Joined: Jun 2009
Posts: 1,256
Likes: 0
From: Maine
Default

You lost some low end grunt and gained mid/top end power. Do a 2nd or 3rd gear pull to redline. It should pull harder up top. I assume a stall would help get you in the powerband, but I'm no a4 expert.
Reply
Old Mar 30, 2011 | 03:31 PM
  #11  
TImmy_Jones's Avatar
TECH Fanatic
iTrader: (4)
 
Joined: Jun 2009
Posts: 1,256
Likes: 0
From: Maine
Default

Sorry, you're m6. I would unplug the battery and drie around easy for 100miles. Let the PCM learn the new mods. A tune would help, but not worth it, IMO.
Reply
Old Mar 30, 2011 | 03:32 PM
  #12  
GTAWS6Brah's Avatar
Thread Starter
Staging Lane
10 Year Member
Liked
 
Joined: Mar 2011
Posts: 65
Likes: 3
Default

Originally Posted by TImmy_Jones
You lost some low end grunt and gained mid/top end power. Do a 2nd or 3rd gear pull to redline. It should pull harder up top. I assume a stall would help get you in the powerband, but I'm no a4 expert.
its an m6
Reply
Old Mar 30, 2011 | 03:46 PM
  #13  
99Bluz28's Avatar
TECH Senior Member
iTrader: (35)
 
Joined: Nov 2007
Posts: 9,705
Likes: 12
From: C. V., Kalifornia
Default

You shouldn't be losing any power, maybe just not gaining any on the low end.
I'd check plugs, and plug wires, then for any codes., and finally take it to a tuner.
Reply
Old Mar 30, 2011 | 03:48 PM
  #14  
TheSilverOne's Avatar
TECH Addict
iTrader: (22)
 
Joined: Apr 2005
Posts: 2,207
Likes: 5
From: Taxachusetts
Default

needs a tune
Reply
Old Mar 30, 2011 | 05:55 PM
  #15  
GTAWS6Brah's Avatar
Thread Starter
Staging Lane
10 Year Member
Liked
 
Joined: Mar 2011
Posts: 65
Likes: 3
Default

Originally Posted by TheSilverOne
needs a tune
will probably do that after intake.
Reply
Old Mar 30, 2011 | 08:33 PM
  #16  
shepss217's Avatar
TECH Enthusiast
iTrader: (5)
 
Joined: Feb 2009
Posts: 574
Likes: 0
Default

i would have someone sit in your car and give it full throttle with it turned off, check to see if the blade is opening all the way and hitting the tab on the outside of the throttle body, when i put on my longtubes i tried disconnecting the throttle cable by removing the tab and it knocked it out of adjustment therefore not getting full throttle, after i adjusted it back it revved alot faster
Reply
Old Mar 30, 2011 | 08:45 PM
  #17  
wav3form's Avatar
TECH Regular
iTrader: (1)
 
Joined: Sep 2010
Posts: 494
Likes: 1
From: Florida
Default

Originally Posted by GTAWS6Brah
the mechanic said i needed new plugs soon. it was fine driving to the mechanics though, i even put an RX-8 in its place.
You could put a RX-8 in its place if you were misfiring on three cylinders. They're dogs.
Reply
Old Mar 31, 2011 | 02:21 AM
  #18  
LS1rob00's Avatar
11 Second Club
iTrader: (9)
 
Joined: Apr 2010
Posts: 978
Likes: 1
From: Bay Area, CA
Default

Originally Posted by TImmy_Jones
Sorry, you're m6. I would unplug the battery and drie around easy for 100miles. Let the PCM learn the new mods. A tune would help, but not worth it, IMO.
You sir are incorrect.
Reply
Old Mar 31, 2011 | 02:47 AM
  #19  
boostedbird38's Avatar
Staging Lane
iTrader: (7)
 
Joined: Feb 2007
Posts: 77
Likes: 0
From: Sumter, SC
Default

You lost low end torque, that's what happens when u do exhaust.

U also need sims on the rear O2's

A tune would also help a bit
Reply
Old Mar 31, 2011 | 03:53 AM
  #20  
CamaroZ28_LS1's Avatar
11 Second Club
iTrader: (5)
 
Joined: Jan 2007
Posts: 394
Likes: 0
From: WA
Default

Funny, I never had any lost power issues on the low end of my car until I put a cam in it, but didn't really lose any power, the power just started later in the rpm range. If anything I think it would be a waste to tune it for just headers unless that is all your going to do. Most Header cars only put down around 330whp to around 350whp.
Reply



All times are GMT -5. The time now is 12:48 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