Home Register FAQ Members List Photo Gallery Garage Search Today's Posts Mark Forums Read Vendors



Go Back   Third Generation F-Body Message Boards > Tech Boards > Tech / General Engine
Reload this Page what happens in closed loop ?
Sign in using an external account
Register Forgot Password?

Tech / General Engine Is your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!

Welcome to ThirdGen.org!
Welcome to ThirdGen.org.

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 the ThirdGen.org community today!


Reply
 
Thread Tools Search this Thread
Old 05-30-2007, 10:27 PM   #1
Junior Member
 
Join Date: Jan 2007
Posts: 79

Classifieds Rating: (0)
what happens in closed loop ?
My car runs smooth when it is cold.Idle is a bit high, When the engine starts to warm up and the idle starts to drop it runs rough and sometimes stalls. What is happening when these cars go into closed loop? I guess thats what is happening right. Car is 5.7 89 GTA
89jim is offline vBGarage Page   Reply With Quote
Old 05-31-2007, 11:47 PM   #2
Junior Member
 
Join Date: May 2007
Posts: 14

Classifieds Rating: (0)
Re: what happens in closed loop ?
when the car gets into closed loop, the computer starts taking info from the sensors and starts making adjustments to how much fuel is getting sent to the cylinders. so hook her up to a scanner and watch what the computer is seeing. sounds like a senor isnt working like it should
scottsz28 is offline vBGarage Page   Reply With Quote
Old 06-01-2007, 12:23 AM   #3
Senior Member
 
84z28350's Avatar
 
Join Date: Aug 2005
Location: Yellowknife, NWT, Canada
Posts: 3,003
Car: 84 Z28
Engine: 357
Transmission: TH-350C
Axle/Gears: 3.43

Classifieds Rating: (0)
Re: what happens in closed loop ?
like scottsz28 said, once in closed loop the ECM starts taking feedback from all of the sensors and adjusts timing/fuel/EGR/ect as required.

could be a sensor, wiring or maybe something as simple as a broken ground wire somewhere. Bad grounds can cause some pretty freaking strange stuff!
84z28350 is offline vBGarage Page   Reply With Quote
Old 06-01-2007, 12:23 AM
ThirdGen
1992 Camaro




Paid Advertisement


Reply

Go Back   Third Generation F-Body Message Boards > Tech Boards > Tech / General Engine
Reload this Page what happens in closed loop ?
« Rebuilt 350 smoking a little at start-up | powerwashing engine »

Tags
car, closed, loop, runs, time
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 Off
Refbacks are Off

 

1982 Camaro '82 || 1983 Camaro '83 || 1984 Camaro '84 || 1985 Camaro '85 || 1986 Camaro '86 || 1987 Camaro '87 || 1988 Camaro '88 || 1989 Camaro '89 || 1990 Camaro '90 || 1991 Camaro '91 || 1992 Camaro '92


All times are GMT -5. The time now is 08:43 PM.

Contact Us - ThirdGen.Org - Advertising - Privacy Policy - Terms of Use - Jobs - Top

Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2012, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.5.2
All content copyright © 1997 - 2012 ThirdGen.org. All rights reserved. No part of this website may be reproduced without the expressed, documented, and written consent of ThirdGen.org's Administrators.

Emails & Contact Details