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

Idle surge help

Thread Tools
 
Search this Thread
 
Old Feb 23, 2008 | 02:31 PM
  #1  
LS1axle's Avatar
Thread Starter
Staging Lane
iTrader: (12)
 
Joined: Nov 2007
Posts: 63
Likes: 0
Default Idle surge help

My idle sures when the car is running and not in gear. The gauges dont move it just sounds like the car is reving up alittle and then it stops. Im all stock and just replaced the plugs and wires. I only have 30k on my car.
Reply
Old Feb 24, 2008 | 01:25 PM
  #2  
LS1axle's Avatar
Thread Starter
Staging Lane
iTrader: (12)
 
Joined: Nov 2007
Posts: 63
Likes: 0
Default

anyone?
Reply
Old Feb 24, 2008 | 01:53 PM
  #3  
shoemike's Avatar
TECH Fanatic
15 Year Member
iTrader: (25)
 
Joined: Dec 2005
Posts: 1,283
Likes: 2
From: Prescott, AZ
Default

does it pull while in gear as well?
it sounds like you might have a vacuum leak.
Reply
Old Feb 24, 2008 | 06:18 PM
  #4  
LS1axle's Avatar
Thread Starter
Staging Lane
iTrader: (12)
 
Joined: Nov 2007
Posts: 63
Likes: 0
Default

Originally Posted by shoemike
does it pull while in gear as well?
it sounds like you might have a vacuum leak.
I really dont notice it when Im driving. I only notice it if im at a stop light or drive thru. It only revs up a bit and then goes back to normal.
Reply
Old Feb 24, 2008 | 06:30 PM
  #5  
Shawn @ VA Speed's Avatar
FormerVendor
iTrader: (3)
 
Joined: Jun 2007
Posts: 2,991
Likes: 2
From: Virginia Beach,Virginia
Default

x2 on the vacuum leak
Reply
Old Feb 24, 2008 | 06:34 PM
  #6  
odarabla's Avatar
10 Second Club
iTrader: (1)
 
Joined: Sep 2007
Posts: 1,500
Likes: 0
From: In Uranus!
Default

Originally Posted by shoemike
does it pull while in gear as well?
it sounds like you might have a vacuum leak.
Reply
Old Feb 24, 2008 | 06:34 PM
  #7  
ollyshawn's Avatar
Teching In
 
Joined: Feb 2008
Posts: 10
Likes: 0
From: Hereford, TX
Default

you might try cleaning your maf sensor
Reply
Old Feb 24, 2008 | 09:26 PM
  #8  
LS1axle's Avatar
Thread Starter
Staging Lane
iTrader: (12)
 
Joined: Nov 2007
Posts: 63
Likes: 0
Default

I will give that try.

Thanks
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

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

 Verdad Gallardo
story-1

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

 Pouria Savadkouei
story-2

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

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

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

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Feb 26, 2008 | 12:22 AM
  #9  
LS1axle's Avatar
Thread Starter
Staging Lane
iTrader: (12)
 
Joined: Nov 2007
Posts: 63
Likes: 0
Default

I cleaned the MAF today and the car ran fine I drove ten miles turned it off and then drove another three miles and turned it off. I went to start it again and the air bag light and the service engine light both came on and will not shut off. What do you guys/gals think it could be?


thanks

Stephen
Reply
Old Feb 26, 2008 | 12:25 AM
  #10  
99z28monster's Avatar
TECH Resident
iTrader: (3)
 
Joined: Oct 2006
Posts: 868
Likes: 0
From: Northern NY
Default

what did you clean the maf with? Make sure all your Vac lines are pluged in and the hoses are not pinched or torn.
Reply
Old Feb 26, 2008 | 01:22 AM
  #11  
LS1axle's Avatar
Thread Starter
Staging Lane
iTrader: (12)
 
Joined: Nov 2007
Posts: 63
Likes: 0
Default

There is a vac line behind my passenger head light that is unhooked? Is there a diagram of the all the vac lins?

thanks
Reply
Old Feb 26, 2008 | 01:09 PM
  #12  
LS1axle's Avatar
Thread Starter
Staging Lane
iTrader: (12)
 
Joined: Nov 2007
Posts: 63
Likes: 0
Default

Anyone want to help the newb?
Reply
Old Feb 26, 2008 | 05:39 PM
  #13  
LS1axle's Avatar
Thread Starter
Staging Lane
iTrader: (12)
 
Joined: Nov 2007
Posts: 63
Likes: 0
Default

Anyone?
Reply
Old Feb 26, 2008 | 05:58 PM
  #14  
badass99ss's Avatar
TECH Apprentice
15 Year Member
iTrader: (17)
 
Joined: May 2007
Posts: 375
Likes: 1
From: Wenatchee WA
Default

Use a thethoscope or grab a piece of 5/8 fuel line and stick it to your ear. Move around your engine bay and listen for a hisssss. Check all vac lines.
Reply
Old Feb 26, 2008 | 06:56 PM
  #15  
LS1axle's Avatar
Thread Starter
Staging Lane
iTrader: (12)
 
Joined: Nov 2007
Posts: 63
Likes: 0
Default

Is there a vac line diagram anywhere? I found a black plastic line unhooked behind the passenger head light but I cant find where it needs to be hooked up?
Reply
Old Feb 26, 2008 | 06:58 PM
  #16  
DaddySS's Avatar
TECH Addict
 
Joined: Dec 2001
Posts: 2,907
Likes: 1
From: Bergen County, NJ
Default

The small hose on the passenger side connects to the plastic adapter at the back of the intake and is the HVAC source vacuum line. You probably knocked it of doint wires? You will need a mirror and thin arms to reach back and plug it back in.
Reply
Old Feb 26, 2008 | 07:58 PM
  #17  
chpmnsws6's Avatar
TECH Addict
iTrader: (70)
 
Joined: Sep 2003
Posts: 2,525
Likes: 2
From: Springfield IL
Default

The hose down by the passenger side is your vacuum reservoir tank.
Reply
Old Feb 26, 2008 | 08:19 PM
  #18  
LS1axle's Avatar
Thread Starter
Staging Lane
iTrader: (12)
 
Joined: Nov 2007
Posts: 63
Likes: 0
Default

Originally Posted by DaddySS
The small hose on the passenger side connects to the plastic adapter at the back of the intake and is the HVAC source vacuum line. You probably knocked it of doint wires? You will need a mirror and thin arms to reach back and plug it back in.
I traced it back and it looks like it goes back toward the intake but i dont know where it connects under the head lamp? My air bag light blinks and then the stupid service engine light comes on.
Reply
Old Feb 26, 2008 | 10:12 PM
  #19  
transAm-98's Avatar
TECH Enthusiast
iTrader: (1)
 
Joined: Mar 2005
Posts: 625
Likes: 0
From: CA, Bay Area
Default

There is only one spot on the back of the intake where you can plug it in. It's a little hard to get with everything bolted up but it can be done just feel around a bit. should be right under the MAP sensor.
Reply
Old Feb 26, 2008 | 11:17 PM
  #20  
LS1axle's Avatar
Thread Starter
Staging Lane
iTrader: (12)
 
Joined: Nov 2007
Posts: 63
Likes: 0
Default

Originally Posted by transAm-98
There is only one spot on the back of the intake where you can plug it in. It's a little hard to get with everything bolted up but it can be done just feel around a bit. should be right under the MAP sensor.
The intake side is hooked up. Where does the other end go?
Reply



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

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE