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#16
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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.
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#17
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Re: hesitation and running issues.
Quote:
i wanna get the ecu and tcu. do you have any ecu's with the switch already installed? |
#18
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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. |
#19
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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. |
#20
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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:
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#21
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Re: hesitation and running issues.
I thought the switch was for regular and premium gas?
So what octane gas is recommended without the switch? |
#22
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Re: hesitation and running issues.
I might desolder the resistor and remove it instead of cutting it just in case!
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#23
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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.
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#24
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Re: hesitation and running issues.
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 |
#25
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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 |
#26
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Re: hesitation and running issues.
You can use regular even with a stock ecu... Just worse gas mileage as it retards timing.
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#27
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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
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#28
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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. |
#29
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Re: hesitation and running issues.
Quote:
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#30
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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.
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