The Subaru SVX World Network   SVX Network Forums
Live Chat!
SVX or Subaru Links
Old Lockers
Photo Post
How-To Documents
Message Archive
SVX Shop Search
IRC users:

Go Back   The Subaru SVX World Network > SVX Main Forums > Technical Q & A

Reply
 
Thread Tools Display Modes
  #16  
Old 01-18-2013, 07:39 PM
longassname's Avatar
longassname longassname is offline
Just some dude.
 
Join Date: Sep 2002
Location: Miami, FL
Posts: 3,986
Significant Technical Input
Re: hesitation and running issues.

Ya, might be the answer to your woes. What you are describing might be the hessitation most SVXs without chips develop. That hesitation is a result of the ECU failing to learn in ignition advance below the torque converter stall speed where there is very little timing in the primary ignition table of the stock ECU firmware.
Reply With Quote
  #17  
Old 01-19-2013, 06:09 AM
steveherman steveherman is offline
Registered User
 
Join Date: Jul 2011
Location: Kissimmee Florida
Posts: 260
Re: hesitation and running issues.

Quote:
Originally Posted by longassname View Post
Ya, might be the answer to your woes. What you are describing might be the hessitation most SVXs without chips develop. That hesitation is a result of the ECU failing to learn in ignition advance below the torque converter stall speed where there is very little timing in the primary ignition table of the stock ECU firmware.
so the ecu failing? does that mean i need a new ecu? or just the new chip?
i wanna get the ecu and tcu.
do you have any ecu's with the switch already installed?
Reply With Quote
  #18  
Old 01-19-2013, 08:13 AM
longassname's Avatar
longassname longassname is offline
Just some dude.
 
Join Date: Sep 2002
Location: Miami, FL
Posts: 3,986
Significant Technical Input
Re: hesitation and running issues.

No, I wasn't saying the ECU is breaking. I was saying it's pretty normal for an SVX not to learn in the timing it needs to run well at the RPM range below the stall speed of the torque converter. The stock programming has very little timing in the primary ignition table in that area and relies on the knock sensors to learn in a bunch of timing. A lot of SVXs just don't learn in that timing. The learning function and the gas we get in this country just don't go well together.

I don't sell ECUs. I only sell the "chip." I sell complete TCUs because they require soldering which is better done by a professional. Most people don't bother using the switch with the ECU chip. Just install it and enjoy the improved performance and no hessitation.


Quote:
Originally Posted by steveherman View Post
so the ecu failing? does that mean i need a new ecu? or just the new chip?
i wanna get the ecu and tcu.
do you have any ecu's with the switch already installed?
Reply With Quote
  #19  
Old 01-19-2013, 09:07 AM
steveherman steveherman is offline
Registered User
 
Join Date: Jul 2011
Location: Kissimmee Florida
Posts: 260
Re: hesitation and running issues.

that would suck and be awesome all at the same time.
i have kinda put off getting themt and been chasing the problem with the inexpensive fixes.
which all together have been expensive... probably more expensive than both the tcu and ecu adapter combined.


does the memory adapter for $219 include the stage1av1 chip?


damn... now not sure... i would hate to spend 518 (for both) and be in same boat.
Reply With Quote
  #20  
Old 01-19-2013, 11:35 AM
longassname's Avatar
longassname longassname is offline
Just some dude.
 
Join Date: Sep 2002
Location: Miami, FL
Posts: 3,986
Significant Technical Input
Re: hesitation and running issues.

Yes, the memory adapter isn't sold alone. $219 is for a stage1av1 which is a memory adapter loaded with a ROM with the Stage1av1 firmware, a grommet, and a small length of wire with a gold sleeve connector so you can use a switch to run the 2nd tune which is stored on the same ROM instead of the default tune. The 2nd tune has a different fuel map which can help if you are running nitrous oxide or racing extensively. On the street you won't notice the difference between the tunes and it's not worth bothering installing the gromet, wire, or a switch.

If the stage1av1 doesn't fix your problem or you don't like it you can return it as long as you do so promptly. Though you might run into a problem going back to stock if you aren't handy at soldering and your ECU doesn't already have a factory tsb ROM in it. You can't remove the stage1 unless you can either reconnect the resistor you have to clip to activate the socket in the ECU or have a TSB ROM to install in the socket.

Quote:
Originally Posted by steveherman View Post
that would suck and be awesome all at the same time.
i have kinda put off getting themt and been chasing the problem with the inexpensive fixes.
which all together have been expensive... probably more expensive than both the tcu and ecu adapter combined.


does the memory adapter for $219 include the stage1av1 chip?


damn... now not sure... i would hate to spend 518 (for both) and be in same boat.
Reply With Quote
  #21  
Old 01-19-2013, 11:55 AM
steveherman steveherman is offline
Registered User
 
Join Date: Jul 2011
Location: Kissimmee Florida
Posts: 260
Re: hesitation and running issues.

I thought the switch was for regular and premium gas?
So what octane gas is recommended without the switch?
Reply With Quote
  #22  
Old 01-19-2013, 11:56 AM
steveherman steveherman is offline
Registered User
 
Join Date: Jul 2011
Location: Kissimmee Florida
Posts: 260
Re: hesitation and running issues.

I might desolder the resistor and remove it instead of cutting it just in case!
Reply With Quote
  #23  
Old 01-19-2013, 01:49 PM
longassname's Avatar
longassname longassname is offline
Just some dude.
 
Join Date: Sep 2002
Location: Miami, FL
Posts: 3,986
Significant Technical Input
Re: hesitation and running issues.

no, that was an older version of stage1. Stage1av1 will work with any grade of US gasoline. The higher the octane the better but you won't experience the hesitation even with regular.
Reply With Quote
  #24  
Old 01-19-2013, 02:08 PM
Sean486's Avatar
Sean486 Sean486 is offline
Happy SVX
Subaru Silver Contributor
 
Join Date: Jul 2005
Location: Mechanicsburg, PA
Posts: 3,406
Registered SVX
Re: hesitation and running issues.

Quote:
Originally Posted by longassname View Post
no, that was an older version of stage1. Stage1av1 will work with any grade of US gasoline. The higher the octane the better but you won't experience the hesitation even with regular.
Wow, cool I didn't realize I could use regular without wiring a switch.
__________________
1992 LSL ebony pearl 170k - Thank you Ron Mummert
Reading Box of Wine Car
-----------------------------------
1992 SVX LSL 5-Speed Sold at 180K 2019
1995 SVX Lsi Polo Sold at 118K 2007
Reply With Quote
  #25  
Old 01-19-2013, 05:01 PM
92 SVX 92 SVX is offline
Registered User
 
Join Date: Feb 2010
Location: Jax Florida
Posts: 1,469
Registered SVX
Re: hesitation and running issues.

I have used regular more often then I like with no problems other then slight loss of mpg with the ecu chip.
Even on aggressive switch
Reply With Quote
  #26  
Old 01-19-2013, 05:28 PM
1986nate 1986nate is offline
Senior Member
Subaru Silver Contributor
 
Join Date: Sep 2008
Location: Meadville, PA-but I'll still travel
Posts: 4,672
Registered SVX
Re: hesitation and running issues.

You can use regular even with a stock ecu... Just worse gas mileage as it retards timing.
Reply With Quote
  #27  
Old 01-21-2013, 01:33 AM
Victor520 Victor520 is offline
Banned
 
Join Date: Oct 2012
Location: USA
Posts: 2
Re: hesitation and running issues.

may be u should make a diagnostic and if you need a tool you can find some good ones here: spobd2.com
Reply With Quote
  #28  
Old 01-23-2013, 09:30 PM
dannmarr's Avatar
dannmarr dannmarr is offline
I work for my SVX
 
Join Date: Jan 2005
Location: Pocono Lake, PA
Posts: 1,647
Registered SVX
Re: hesitation and running issues.

Any advatages upgrading from the older stage1 to the newer one?
__________________
Father of 5 sons and 1 daughter

Subaru SVX for fun
Hyundai Veracruz for the wife.
Susuki SX4 for my older son
Ford Ranger for work
Mercedes Benz Sprinter for vacation trips,
EZ GO Golf cart for driving kids around gated community.
Reply With Quote
  #29  
Old 01-24-2013, 05:24 AM
steveherman steveherman is offline
Registered User
 
Join Date: Jul 2011
Location: Kissimmee Florida
Posts: 260
Re: hesitation and running issues.

Quote:
Originally Posted by Victor520 View Post
may be u should make a diagnostic and if you need a tool you can find some good ones here: spobd2.com
My car is obd1.
Reply With Quote
  #30  
Old 01-24-2013, 08:30 AM
longassname's Avatar
longassname longassname is offline
Just some dude.
 
Join Date: Sep 2002
Location: Miami, FL
Posts: 3,986
Significant Technical Input
Re: hesitation and running issues.

Yes, av1 offers both better performance and fuel economy than stage1v5 which was the last version of stage 1 before we made the monumental leap to Stage1av1. Stage1av1 has been out for a long time now--2 or 3 years I think and I suspect it will be the last version. I think we have reached the pinacle of SVX tuning with it.


Quote:
Originally Posted by dannmarr View Post
Any advatages upgrading from the older stage1 to the newer one?
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


All times are GMT -6. The time now is 06:10 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
© 2001-2015 SVX World Network
(208)-906-1122