Welcome to the North American Subaru Impreza Owners Club Tuesday March 19, 2024
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
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.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 05-19-2007, 07:11 PM   #1
RemlapaN
Scooby Newbie
 
Member#: 58251
Join Date: Mar 2004
Chapter/Region: Tri-State
Location: Northeast PA
Vehicle:
2004 Sti
GT35R 530whp @ 27psi

Default Question about high idle on Hydra

Hopefully some of you more experienced with the hydra can help me resolve a small problem I encountered after installing the following mods:

perrin 815cc injectors, GT52, APS Inlet, APS Fuel rails
(Hydra has been in the car for over a year)

So after getting all this installed, I load the base map, and the car is idling at 1200rpm, I check the Idle speed target for 90c coolant temp, and its set to 904 target (Yes coolant temp was currently at 90c, so I was in the right load site too )

I double checked, my TPS is calibrated properly (min set to 43, max at 160ish), so it is reading 0***37; TPS at idle, my idle P,I,D is 135,195,50 respectively, min PWM is at 20, I tried setting it to 5 but no noticeable change.

AFR's at idle are (now) 14.7:1 after I removed some fuel in the -535mmHG / 600-1200rpm load sites from the base map.


What else could I be missing to get the idle to drop down to where it should be? I did the simple vacuum leak tests involving pinching some hoses, spraying some choke cleaner in various areas listening for an idle increase, and found nothing of the sort.

Am I doing something stupid or forgetting a setting? A 1200-1300rpm idle tends to get a little annoying after awhile

As soon as phil gets back from europe I plan on getting it tuned by him, I Just want to get some of the minor tuning out of the way and make sure there are no mechanical problems before that point.
* Registered users of the site do not see these ads.
RemlapaN is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 05-19-2007, 07:15 PM   #2
WhiteKnight
Scooby Newbie
 
Member#: 56133
Join Date: Feb 2004
Vehicle:
2004 Euro spec Sti
Black - Rotated gt3037s

Default

Go to SELECT-OUTPUTS menu,

Check that if ISCO is selected in one of the PWM's,

if it is not selected, ISCO is selected in PWM 4, in my map.

Hope it helps..
WhiteKnight is offline   Reply With Quote
Old 05-19-2007, 07:28 PM   #3
RemlapaN
Scooby Newbie
 
Member#: 58251
Join Date: Mar 2004
Chapter/Region: Tri-State
Location: Northeast PA
Vehicle:
2004 Sti
GT35R 530whp @ 27psi

Default

Quote:
Originally Posted by WhiteKnight View Post
Go to SELECT-OUTPUTS menu,

Check that if ISCO is selected in one of the PWM's,

if it is not selected, ISCO is selected in PWM 4, in my map.

Hope it helps..
PWM Map 4 is the boost control map on the USDM STi's, I would assume that yours is different being a euro spec?
RemlapaN is offline   Reply With Quote
Old 05-20-2007, 06:09 PM   #4
WhiteKnight
Scooby Newbie
 
Member#: 56133
Join Date: Feb 2004
Vehicle:
2004 Euro spec Sti
Black - Rotated gt3037s

Default

I dont mean the PWM MAP 4 , i mean the PWM 4 in the OUTPUTS MENU, PWM MAP 4 is also boost control in my Hydra , but the one in the outputs menu is different.
WhiteKnight is offline   Reply With Quote
Old 05-20-2007, 06:55 PM   #5
TAZ_WRX
Scooby Newbie
 
Member#: 33364
Join Date: Feb 2003
Default

Quote:
Originally Posted by WhiteKnight View Post
I dont mean the PWM MAP 4 , i mean the PWM 4 in the OUTPUTS MENU, PWM MAP 4 is also boost control in my Hydra , but the one in the outputs menu is different.

you mean this?

TAZ_WRX is offline   Reply With Quote
Old 05-20-2007, 07:03 PM   #6
WhiteKnight
Scooby Newbie
 
Member#: 56133
Join Date: Feb 2004
Vehicle:
2004 Euro spec Sti
Black - Rotated gt3037s

Default

Yes, that is exacty what i tried to explain.
This is the correct selection,

Thanks !
WhiteKnight is offline   Reply With Quote
Old 05-20-2007, 09:19 PM   #7
El Gato
Scooby Specialist
 
Member#: 110648
Join Date: Mar 2006
Chapter/Region: PRSIC
Location: San Juan, Puerto Rico
Vehicle:
2005 Hydramist 35R82
93oct 479whp 456tq

Default

if you have an sti, I believe a map that affects the idle is on the 2d pwm map 2. s/b around 0%X = 22, 7%X=33.2, 13%X=46.8, 20%X=60.4 and after that 74.8 all the way to the end. Mine came high in the first three values and would idle at about 1500.
El Gato is offline   Reply With Quote
Old 05-22-2007, 09:41 PM   #8
RemlapaN
Scooby Newbie
 
Member#: 58251
Join Date: Mar 2004
Chapter/Region: Tri-State
Location: Northeast PA
Vehicle:
2004 Sti
GT35R 530whp @ 27psi

Default

Quote:
Originally Posted by El Gato View Post
if you have an sti, I believe a map that affects the idle is on the 2d pwm map 2. s/b around 0%X = 22, 7%X=33.2, 13%X=46.8, 20%X=60.4 and after that 74.8 all the way to the end. Mine came high in the first three values and would idle at about 1500.
My 0X site was at 20, lowering it to 8 brought my idle right down to the idle target of 904 - hopefully PWM2 does control the ISC, and this does not have any negative side effects, thanks for the suggestion.
RemlapaN is offline   Reply With Quote
Old 05-22-2007, 11:05 PM   #9
El Gato
Scooby Specialist
 
Member#: 110648
Join Date: Mar 2006
Chapter/Region: PRSIC
Location: San Juan, Puerto Rico
Vehicle:
2005 Hydramist 35R82
93oct 479whp 456tq

Default

Quote:
Originally Posted by RemlapaN View Post
My 0X site was at 20, lowering it to 8 brought my idle right down to the idle target of 904 - hopefully PWM2 does control the ISC, and this does not have any negative side effects, thanks for the suggestion.
It does controls the ISC. For some reason yours had to be lower. It worked? Great!! Just passing the favor. I had the same issue and a fella helped me out back then...
El Gato is offline   Reply With Quote
Old 05-22-2007, 11:14 PM   #10
RemlapaN
Scooby Newbie
 
Member#: 58251
Join Date: Mar 2004
Chapter/Region: Tri-State
Location: Northeast PA
Vehicle:
2004 Sti
GT35R 530whp @ 27psi

Default

Quote:
Originally Posted by El Gato View Post
It does controls the ISC. For some reason yours had to be lower. It worked? Great!! Just passing the favor. I had the same issue and a fella helped me out back then...
Yes, it did immediately bring my idle right to where it should be sitting by lowering it, however I found a thread on HydraEMS's forums indicating that on an STi the 0X cell should never be below 20.

(Here: http://www.hydraems.com/forums/viewt...hp?p=1490#1490 ) (Oddly enough, it looks like your thread LOL)

So I should probably put that back to 20, and go from there. From that post, it sounds like I will need to raise the I of my ISC, however I had it up to 195 and was still idling ~200rpm higher than the target. Its not like its the end of the world, I can tolerate a 1200rpm idle until I get to bring the car in for a tune
RemlapaN is offline   Reply With Quote
Old 06-01-2007, 10:32 AM   #11
Element Tuning
Former Vendor
 
Member#: 54918
Join Date: Feb 2004
Chapter/Region: MAIC
Location: Gaithersburg, MD
Vehicle:
673 WHP Element
Tuning Pro Comp Engine

Default

Most of the information posted here is incorrect for the STi. The STi is DBW and does not have an idle speed control valve so DO NOT MAKE CHANGES TO YOUR OUTPUTS. If your idle is high then look for a vacuum leak and if you are confident there are none then PWM Map 2 is for adjusting DBW idle. On most Hydras that are not brand new as in shipped this month you cannot use a value below 20. On new Hydras shipped in May you can go lower. This map would be similar to adjusting the minumum pwm duty for the WRX. Also increasing the integral under isc settings will also lower the idle. Typically the base settings of 20 for PWM Map 2 and 175 for the integral should deliver an idle around 800 to 900 rpm.

Thanks,
Phil
www.elementtuning.com
Element Tuning is offline   Reply With Quote
Reply

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
Extreme high idle on start-up Hendathor Normally Aspirated Powertrain 10 01-18-2009 05:31 PM
Question about a rattle on the '08 WRX at high speeds arcli9ht Newbies & FAQs 6 12-26-2007 12:22 PM
high idle on a 2.2L jhew84 Normally Aspirated Powertrain 7 03-31-2006 12:43 AM
engine has high idle on start up Call_me_Tom Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 13 04-28-2005 05:55 PM
High idle on hot days Dieselb0y Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 2 07-01-2004 08:15 PM

All times are GMT -4. The time now is 04:00 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2024 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission
Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.