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

Normal Idle rpms...M6

Thread Tools
 
Search this Thread
 
Old Feb 7, 2005 | 02:45 PM
  #1  
98BirdLS1's Avatar
Thread Starter
TECH Apprentice
 
Joined: Nov 2004
Posts: 314
Likes: 0
Default Normal Idle rpms...M6

What is the normal idle rpms for a M6 Trans Am.

Mine Idles around 1k, and I think thats a little high, I've checked as much as I can think of and tried adjusting the idle adjustment screw, if I lower it anymore the throttle blade sticks inside the throttle body. My only mod is a lid, and it idle at 1k before the lid. Thanks for any help.

Luke
Reply
Old Feb 7, 2005 | 02:59 PM
  #2  
777's Avatar
777
TECH Senior Member
iTrader: (21)
 
Joined: Jun 2004
Posts: 6,697
Likes: 2
From: Jacksonville, FL
Default

that's high...unless you have a fairly large cam (which you don't)...i'd say normal is 750-800
Reply
Old Feb 7, 2005 | 03:37 PM
  #3  
Another_User's Avatar
TECH Addict
 
Joined: Feb 2004
Posts: 2,826
Likes: 0
Default

Perfectly normal. The idle is set at 800 from the factory, and every M6 I have seen runs at "1000", even though the PCM says it is 800. The gauge is wrong. I wish we could calibrate it, because mine is about 200 rpms off all the way up the tach.
Reply
Old Feb 7, 2005 | 03:45 PM
  #4  
8-Pack's Avatar
TECH Regular
 
Joined: Sep 2004
Posts: 408
Likes: 0
From: Deployed
Default

Mine dosent, check all the ducts that connect to the throttle body. Factory tachs are innaccurate though
Reply
Old Feb 7, 2005 | 04:12 PM
  #5  
BriancWS6's Avatar
10 Second Club
iTrader: (18)
 
Joined: Mar 2004
Posts: 3,910
Likes: 1
From: The Garage
Default

Mine shows about 800 when at operating temp.
Reply
Old Feb 7, 2005 | 04:58 PM
  #6  
Another_User's Avatar
TECH Addict
 
Joined: Feb 2004
Posts: 2,826
Likes: 0
Default

Well we both have 98s.
Reply
Old Feb 7, 2005 | 05:07 PM
  #7  
Lil Mac's Avatar
Staging Lane
 
Joined: Feb 2004
Posts: 68
Likes: 0
From: Ontario, Canada
Default

Originally Posted by BriancWS6
Mine shows about 800 when at operating temp.

Same here.. seems to flutter about 50 RPMS, but not enough to notice.
Reply
Old Feb 7, 2005 | 05:19 PM
  #8  
luv2spd's Avatar
TECH Fanatic
iTrader: (1)
 
Joined: Feb 2004
Posts: 1,152
Likes: 0
From: Newton, KS
Default

Yeah, they are set at 800 rpm on the stock tune even though the tach indicates 1000. My tach is off by 150-200 rpms all the time.
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 7, 2005 | 05:31 PM
  #9  
01_SuperSlow's Avatar
TECH Fanatic
iTrader: (7)
 
Joined: Jun 2003
Posts: 1,214
Likes: 1
From: SoCal
Default

When I was stock, my tach read about 750-800 rpms idle.
Reply
Old Feb 7, 2005 | 06:03 PM
  #10  
Another_User's Avatar
TECH Addict
 
Joined: Feb 2004
Posts: 2,826
Likes: 0
Default

I bet it is a 98 thing. They always were the black sheep.
Reply
Old Feb 7, 2005 | 06:56 PM
  #11  
tomaSS's Avatar
TECH Apprentice
iTrader: (1)
 
Joined: Mar 2004
Posts: 327
Likes: 0
From: Las Vegas
Default

My stock 2000 idled between 790-830 rpms. When I got my cam, I raised the idle to 875. I agree, the stock tach is not the most accurate. But mine seems to be pretty close.
Reply
Old Feb 7, 2005 | 07:26 PM
  #12  
jrp's Avatar
jrp
SN95 Director
20 Year Member
iTrader: (16)
 
Joined: Jul 2003
Posts: 10,755
Likes: 7
From: Valencia, Ca
Default

Originally Posted by Another_User
Perfectly normal. The idle is set at 800 from the factory, and every M6 I have seen runs at "1000", even though the PCM says it is 800. The gauge is wrong. I wish we could calibrate it, because mine is about 200 rpms off all the way up the tach.


tach says 1k and EFI says ~750
Reply
Old Feb 8, 2005 | 12:51 PM
  #13  
Camaro99SS's Avatar
TECH Resident
20 Year Member
iTrader: (4)
 
Joined: Nov 2004
Posts: 879
Likes: 0
From: Nashville, TN
Default

800 here I'd bet the that reading is pretty accurate, but once you get on the car or rev it in neutral, the stock tach falls way behind, probably 300rpms low by the end of 1st gear.

Jason
Reply




All times are GMT -5. The time now is 08:54 AM.

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