Welcome to the North American Subaru Impreza Owners Club Thursday October 23, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Normally Aspirated with bolt-on Forced Induction Powertrain

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.
Reply
 
Thread Tools Display Modes
Old 05-20-2005, 10:21 AM   #1
ExecNav
Scooby Specialist
 
Member#: 30554
Join Date: Nov 2002
Chapter/Region: South East
Location: Ellijay, GA
Vehicle:
08 LGT Spec.B
01 Impreza RS-T

Question Car stalling at idle...

Every now and then when I have the A/C on and the compressor kicks on, the car will stumble and die if I don't blip the throttle. When I do blip it, the RPMs will go up to 2000-2500 or so, stay there for a couple seconds and eventually drop back down.

Also, the engine seems to be losing a ton of power when the A/C is on. At a constant throttle position during acceleration, there is a very noticeable decrease in performance. I checked the belts and they don't feel like they are too tight but I probably don't know what it should be like. Any ideas?

-Brett
* Registered users of the site do not see these ads.
ExecNav is offline   Reply With Quote
Old 05-20-2005, 10:42 AM   #2
White 2.5rs
Scooby Guru
 
Member#: 39936
Join Date: Jul 2003
Vehicle:
99RS TWE&SCAT EJ257
Hydra+HMist+PPG+35R=DEATH

Default

lol u always should tell what EM ur using ???
White 2.5rs is offline   Reply With Quote
Old 05-20-2005, 10:53 AM   #3
Aphex28
Scooby Specialist
 
Member#: 11506
Join Date: Oct 2001
Chapter/Region: NESIC
Location: Nashua, NH
Vehicle:
2015 WRX
WRB +TE37-TA

Default

Yah.. it definately sounds like your EM isn't tuned for the AC yet
Aphex28 is offline   Reply With Quote
Old 05-20-2005, 02:55 PM   #4
ExecNav
Scooby Specialist
 
Member#: 30554
Join Date: Nov 2002
Chapter/Region: South East
Location: Ellijay, GA
Vehicle:
08 LGT Spec.B
01 Impreza RS-T

Default

E-Manage, WRX fuel pump, 440cc injectors, 7psi, etc...

Okay so what's involved with tuning for A/c...

-Brett
ExecNav is offline   Reply With Quote
Old 05-20-2005, 03:05 PM   #5
Aphex28
Scooby Specialist
 
Member#: 11506
Join Date: Oct 2001
Chapter/Region: NESIC
Location: Nashua, NH
Vehicle:
2015 WRX
WRB +TE37-TA

Default

just turn the ac on.. and start tuning
I saw soembody do this with a Hydra.. but don't ask me any specifics.
Aphex28 is offline   Reply With Quote
Old 05-20-2005, 08:46 PM   #6
ai42
Scooby Specialist
 
Member#: 71348
Join Date: Sep 2004
Chapter/Region: TXIC
Location: Frisco, TX
Vehicle:
1999 EJ207 RS.TI
VW Golf TDI 40mpg baby!

Default

I have the same issue with my setup and emanage. Hydra I know has a setting to increase fuel when A/C is on. However, with an Emanage setup either you tune with A/C on and therefore run rather rich when A/C is off (which can cause the engine to die when A/C is off) or you have a laptop and mutliple maps and switch when A/C is on/off. There certainly are advantages to a full aftermarket EM setup.
ai42 is offline   Reply With Quote
Old 05-21-2005, 02:34 AM   #7
Hitokiri
Scooby Specialist
 
Member#: 2604
Join Date: Oct 2000
Chapter/Region: NESIC
Location: CA
Vehicle:
1999 2.5RSt
RBP

Default

when the AC steps on, the idle should increase slightly. You can expand the maps around those load sites to work the cinks out.

Also, I would try adding a little timing at idle or even in a load site lower than idle. I have additional timing added at idle and below such that if the car starts to stall, it will make a little more power and kick itself back up. This technique is widly used on cars with light flywheels to prevent them from stalling as the revs come down.

you don't have any more control out of a full standalone unless it has specific control maps for AC. Usually its just a step up of idle speed.

Todd
Hitokiri 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
Car Stalling at Idle after minor Mods MaLT Newbies & FAQs 21 01-10-2012 03:58 PM
new battery, now car stalls at idle 04works UTEC 7 02-16-2007 05:48 PM
Car stalling at idle joeyd02 Newbies & FAQs 3 10-16-2006 11:23 PM
--> <-- this close to stalling at idle. RaceCarRiot Normally Aspirated Powertrain 4 01-29-2002 07:39 PM
Stalled at idle... RallyImprezive Normally Aspirated Powertrain 3 04-10-2001 01:30 PM


All times are GMT -4. The time now is 05:20 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.