Go Back   LS1TECH > LS1-LS2-LS3-LS6-LS7 PERFORMANCE > PCM Diagnostics & Tuning
Sign in using an external account
Register Forgot Password?
Search

PCM Diagnostics & Tuning
HP Tuners | AutoTap | Diablo | MAF Translator | HPP3 | FAST | Gen7 | Big Stuff 3
Sponsored by
Diablo Sport

Welcome to LS1Tech.com!
Welcome to LS1Tech.com.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join LS1Tech.com today!


Reply
 
Thread Tools Search this Thread
Old 06-01-2010, 08:32 PM   #1
Launching!
Garage is empty, add now
 
Trader Rating: 1
Join Date: Aug 2007
Posts: 275
Default Setting Idle on a LS1

2002 F-body LS1.
How do you set the idle?? Is it tuned in through the computer or do you adjust it at the throttle body??

Thanks
skeeters65 is offline   Reply With Quote
Old 06-01-2010, 08:36 PM   #2
12 Second Club
Garage is empty, add now
 
MUSTANGBRKR02's Avatar
 
Trader Rating: 86
Join Date: Aug 2006
Location: Havelock, NC
Posts: 4,503
Default

computer controlled.
__________________
02 T/A WS6 Vert Bullseye Power S594 billet turbo, Dart LS 427 by LME and a RMVB TH400

Custom turbo kit and build by Doug Macy (Camaro9969)
MUSTANGBRKR02 is offline   Reply With Quote
Old 06-01-2010, 08:38 PM   #3
TECH Addict
1999 Pontiac Trans Am
 
99'CajunFirehawk157's Avatar
 
Trader Rating: 56
Join Date: Jun 2007
Location: USA
Posts: 2,503
Default

PCM runs the show, no manual setting required.
__________________
1 of 12 1999 Firehawk T/A Red Verts w/A4
99'CajunFirehawk157 is offline   Reply With Quote
Old 06-01-2010, 09:01 PM   #4
Launching!
Garage is empty, add now
 
Trader Rating: 1
Join Date: Aug 2007
Posts: 275
Default

Thanks..
Thats what I thought but was hoping you could do it at the TB to save me a trip to the tuners..

Any chance you can do it with a scan tool??
skeeters65 is offline   Reply With Quote
Old 06-01-2010, 09:18 PM   #5
12 Second Club
Garage is empty, add now
 
MUSTANGBRKR02's Avatar
 
Trader Rating: 86
Join Date: Aug 2006
Location: Havelock, NC
Posts: 4,503
Default

Not likely. Why does it need to be set?
__________________
02 T/A WS6 Vert Bullseye Power S594 billet turbo, Dart LS 427 by LME and a RMVB TH400

Custom turbo kit and build by Doug Macy (Camaro9969)
MUSTANGBRKR02 is offline   Reply With Quote
Old 06-01-2010, 10:46 PM   #6
Staging Lane
1998 Chevrolet Corvette
My Garage
 
jeff2380's Avatar
 
Trader Rating: 3
Join Date: Apr 2006
Location: Toronto
Posts: 72
Send a message via MSN to jeff2380
Default

If your adjusting for a larger replacement cam, this is from a tuning guide...
Quote:
IAC Relearn Procedure
If you are having idle issues you may need to reset your Idle Air Control (IAC) and TPS, do this before you start drilling holes in your throttle body (TB) blade. I have used this procedure on some huge cammed cars and it worked.
1) Monitor your IAC, Idle Speed, throttle position voltage and your throttle position %.
2) With the key in the ON position, adjust your TB set screw until your throttle position is 2%.
3) Turn your key to the OFF position.
4) Unplug your Throttle Position Sensor (TPS) and IAC.
5) Turn your key to the ON position for a few seconds, and then OFF again.
6) Plug in the TPS and IAC and then turn your key to the ON position and restart logging. Your throttle position will now be reset to 0 degrees and about .45-.55 volts.
7) Start your engine, your IAC should be 40-60 for a cammed engine.
If you are not at your desired IAC position, redo the above procedures in smaller increments.
__________________
Toronto F-Body Motorsports Solo2 Director -http://www.tfbm.org
2002 Black Camaro LS1 B4C A4, 402 LS2 from cdnperf.com 478rwhp
http://youtube.com/watch?v=z0dvAW5YOvo
1998 Black Corvette Coupe A4, 224 cam, Vortex Ram Air, Jet Hot Headers, X-pipe, Corsa pace car exhaust, Z06 Sways, springs and shocks, poly bushings.
jeff2380 is offline   Reply With Quote
Old 06-02-2010, 09:46 AM   #7
Launching!
Garage is empty, add now
 
Trader Rating: 1
Join Date: Aug 2007
Posts: 275
Default

Quote:
Originally Posted by jeff2380 View Post
If your adjusting for a larger replacement cam, this is from a tuning guide...
Can is a MS3. I would say that is a large cam, right??

I also have another idle problem not sure if they are related. Once in a while when I am coming to a stop with the clutch in and off the gas pedal completely the engine will idle at about 1500rpm until about 2 or 3 seconds after the car comes to a complete stop. Then it drops right down to the normal 1050 or so idle..

Any idea why it does that??

Has anyone else done this IAC re-learn with good results??

Thanks
skeeters65 is offline   Reply With Quote
Old 06-02-2010, 04:30 PM   #8
12 Second Club
Garage is empty, add now
 
MUSTANGBRKR02's Avatar
 
Trader Rating: 86
Join Date: Aug 2006
Location: Havelock, NC
Posts: 4,503
Default

You need to have the car tuned to work out all of these issues. You can do the IAC relearn but you need logging software to see the readings you need to make adjustments.

You spent money on the cam now either spend money on a program or a tune to take advantage of that cam.
__________________
02 T/A WS6 Vert Bullseye Power S594 billet turbo, Dart LS 427 by LME and a RMVB TH400

Custom turbo kit and build by Doug Macy (Camaro9969)
MUSTANGBRKR02 is offline   Reply With Quote
Old 06-02-2010, 04:34 PM   #9
Launching!
Garage is empty, add now
 
Trader Rating: 1
Join Date: Aug 2007
Posts: 275
Default

It was tuned by a shop that was recomended on here..

Not sure why it does it but it isnt all the time so I hate to drive an hour to the shop and not have it do it. That would be my luck!!
Thanks
skeeters65 is offline   Reply With Quote
Old 06-02-2010, 08:39 PM   #10
12 Second Club
Garage is empty, add now
 
MUSTANGBRKR02's Avatar
 
Trader Rating: 86
Join Date: Aug 2006
Location: Havelock, NC
Posts: 4,503
Default

Call the shop and let them help you
__________________
02 T/A WS6 Vert Bullseye Power S594 billet turbo, Dart LS 427 by LME and a RMVB TH400

Custom turbo kit and build by Doug Macy (Camaro9969)
MUSTANGBRKR02 is offline   Reply With Quote
Old 06-02-2010, 08:49 PM   #11
12 Second Club
2004 Pontiac GTO
 
svede1212's Avatar
 
Trader Rating: 2
Join Date: Apr 2004
Location: Grand Rapids, Michigan
Posts: 970
Default

There's a lot more to tune idle than adjusting an idle screw. It is one of the most intensive parts of tuning and few shops take the time and do it well. You need the correct timing, RAF and a host of other things done. The only time I'd adjust the idle screw is if the IAC counts are too high when the engine is warmed up
__________________
2004 Blk/Rd M6 (Ziggy)

svede1212 is offline   Reply With Quote
Old 06-06-2010, 03:11 PM   #12
Launching!
Garage is empty, add now
 
Trader Rating: 1
Join Date: Aug 2007
Posts: 275
Default

Thanks for the info guys.
I checked the idle with a scan tool and it idles right aroud 950..
Guess the Autometer gauge is off a hair..
skeeters65 is offline   Reply With Quote
Old 07-07-2012, 11:40 AM   #13
TECH Addict
Garage is empty, add now
 
gMAG's Avatar
 
Trader Rating: 1
Join Date: Mar 2003
Location: CT
Posts: 2,948
Default

Quote:
Originally Posted by skeeters65 View Post
I also have another idle problem not sure if they are related. Once in a while when I am coming to a stop with the clutch in and off the gas pedal completely the engine will idle at about 1500rpm until about 2 or 3 seconds after the car comes to a complete stop. Then it drops right down to the normal 1050 or so idle..

Any idea why it does that??

Thanks
I had this, too. If I remember correctly, "thunderstruck" dealt with this, as well.
He found a faulty brake booster, which had a vacuum leak.
I found a bad manifold gasket.
This solved the problem.

Sorry, guys, I was redirected here from another thread, and didn't realize before I posted, that it is 2 years old.
__________________
Glenn
Camaro Build http://www.ls1tech.com/forums/conver...l#post14210771
67 RS-68 glass-98 LS1 TR224/561/114-LS6 int-Jantzer port TB- self ported heads-Yellas-JWIS-AMW-BeCool-March UD-Hooker LT -Magnaflow X-TKO 600 .063-Moser 9 w/TT 3.70-Discs -Hotchkiss lowering & frame connectors-TA's.
gMAG is offline   Reply With Quote
Old 07-07-2012, 11:40 AM
LS1Tech
Pontiac Firebird




Paid Advertisement
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Stop drilling those TBs, fix stalling without computer tuning... Another_User PCM Diagnostics & Tuning 122 03-24-2014 10:00 PM
MAP Reading High at Idle 1slowbusa PCM Diagnostics & Tuning 4 06-11-2013 09:35 AM
idle timing? STAR PCM Diagnostics & Tuning 8 09-09-2011 12:16 PM
Low Vacuum at Idle - in the tune? Kevin Doe PCM Diagnostics & Tuning 8 10-26-2007 04:44 PM
How do you break in a cam on a LS1? LUV269 Generation III Internal Engine 31 04-14-2003 11:59 PM


Tags
adjust, adjusting, adjustment, cam, diablo, iac, idle, ls1, ms3, procedure, reset, screw, settings, tb, tps


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off




All times are GMT -5. The time now is 12:19 AM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Service - Privacy Statement - JOBS
Emails & Contact Details