Welcome to the North American Subaru Impreza Owners Club Monday September 25, 2017
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
Go Back   NASIOC > NASIOC Technical > Engine Management & Tuning > Other Engine Management

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

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, free of charge, 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, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads. 
Thread Tools Display Modes
Old 01-16-2006, 05:11 AM   #1
Scooby Newbie
Member#: 1791
Join Date: Jul 2000
Location: San Pedro, CA, USA
Default Help Hydra and stops..

I got my car running now.. Using a base map.. it runs fine after 2000 rpm but idle goes up and down and when i get to a stop the cars dies.. what can i do to find my problem or is it something i need to do with the hydra..
* Registered users of the site do not see these ads.
Sparcomx is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 01-16-2006, 07:49 AM   #2
Scooby Guru
Member#: 15359
Join Date: Feb 2002
Chapter/Region: MAIC
Location: Fairfax, VA

Read the tuning guides under elementtuning.com

dunk is offline   Reply With Quote
Old 01-16-2006, 11:14 AM   #3
Element Tuning
Former Vendor
Member#: 54918
Join Date: Feb 2004
Chapter/Region: MAIC
Location: Gaithersburg, MD
673 WHP Element
Tuning Pro Comp Engine


That really sounds like a vacuum leak, possibly at the injector o-rings. It could also be too lean. 9 out of ten times when the idle oscillates and the car dies the AFR is too lean.

Post or email me a pertinent piece of a data log at full speed (data not car) and I'm sure we can help.

Element Tuning is offline   Reply With Quote
Old 01-16-2006, 01:15 PM   #4
Scooby Specialist
Member#: 56468
Join Date: Mar 2004
Chapter/Region: NWIC
Location: Seattle, WA
04 Improved STI
Dirty White


Eliminate vacuum as a source of problems. If it's oscillating, moving up or down, once every second, I agree vacuum is the place to look. Black smoke out the tail after start up-->vacuum.

Like Phil mentions it could be lean. If you have a WB O2 sensor, when the car is warm, turn on the RPM and Load Tracking and watch the AFR at idle. You will see the load sites change (or not). Tune all the load sites around the main idle site such that the AFR is around 14.5. If you are above AFR=15 you need to add fuel to all the sites surrounding the principle idle site, not just the most active one. Even with a narrow band you should be able to tune idle.

Raise the Moving Steps in Settings/Injection to prevent dying when coming to a stop. If the idle is dropping below it's target (Idle Target Map) raise the PWM Min in the Settings/ISC until it no longer drops below the targeted idle speed.

Try to describe the phenomena after the engine is fully warm more. That will help pinpoint what's up.
bboy is offline   Reply With Quote

Thread Tools
Display Modes

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
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Hydra And stops Sparcomx Other Engine Management 2 01-29-2008 01:29 PM
Help, Hydra Issues. DBW etc.. 520hpsti Other Engine Management 29 11-11-2007 09:35 PM
Help Hydra Tuning !!!! MIDNIGHTROCKET Mid Atlantic Impreza Club -- MAIC 10 09-24-2007 08:47 PM
help hydra Oscillation Sparcomx Other Engine Management 7 08-03-2006 09:05 PM
!help! headlights and foglights stopped working STI_forester Electrical & Lighting 1 02-01-2005 11:38 PM

All times are GMT -4. The time now is 02:00 PM.

Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2017 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.