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#1
10-11-2001, 06:52 PM
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Another Resistor Mod
Line pressure resistor by the battery. Increase your line pressure. The blinking power light comes on when the car starts. How do you know if got some other problem? Want increased line pressure and a functioning warning system?
Try the "NEW RESISTOR MODIFICTAION"......... What is this you ask? Increase the resistance of that resistor. How do you do that? Wire in a resistor of equal value in series with the old resistor  Well any way I have done this on my car. I got a LEGACY resistor and connector (from a slavage yard) and wired it in series. 
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#2
10-11-2001, 06:57 PM
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Re: Another Resistor Mod
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Lwin
__________________
Lwin M. Maung (Member # 147) Current SVX: NONE Previous SVXes: 1994 LE Barcelona Red 107k 1992 LS-L Pearl White 143k 1994 LSi Bordeaux Pearl 220k 1992 LS-L Ebony Pearl 184k 1992 LS-L Liquid Silver 145k 1992 LS-L Liquid Silver 102k 1992 LS-L Ebony Pearl 123k Other current cars:2001 Jeep Grand Cherokee Black If at first you don't succeed, CHEAT!
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#3
10-11-2001, 11:07 PM
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Re: Another Resistor Mod
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Randy Johnson 3rd Registered Member 02-21-2001 First Member to Reach 10,000 Posts First to arrive at the very first Reading Meet Subaru Ambassador 1992 SVX PPG Pace Car Replica 110+k 1993 White Impreza L 240+K miles 2001 Legacy Outback Limited Sedan 250+K miles 2013 Deep Indigo Pearl Legacy 3.6R 49+K miles "Reading is my favorite Holiday" Mike Davis -- at Reading VI
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#4
10-11-2001, 11:36 PM
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Mine was 10.5 ohms. If I remember correctly, somewhere in the shop manuals, it gives a broad range. Anywhere from 7 to 15 ohms, or something like that.
The Legacy/Outback resistor is located on the passenger side strut tower, on the front side. The one I had measured the same as my SVX one, so if you can find a wrecked Legacy or Outback (maybe even Impreza-don't know for sure), you should be able to get ahold of one. (Check to make sure it's an automatic before you spend too much time looking! )
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Rich '02 Toyota MR2 Spyder (Previous '93 SVX Owner)
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#5
10-12-2001, 04:49 AM
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Re: Another Resistor Mod
Quote:
Maybe I missed it, but what is the effect of this mod?
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#6
10-12-2001, 10:51 AM
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Re: Re: Another Resistor Mod
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2005 RX-8 Grand Touring 2005 Outback 2002 Mercedes-Benz E320 wagon END OF LINE
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#7
10-12-2001, 11:12 AM
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Re: Re: Another Resistor Mod
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#8
10-12-2001, 06:03 PM
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Re: Re: Re: Another Resistor Mod
Quote:
 I understand some E&M physics. So here goes. Resistor mod the old way. Remove the resistor, decrease overall resistance and effects as above.New way, put in new resistor, increase resistance, and same effects. How does this work. THanks. My wife always says that my biggest fault is trying to understand everything. Maybe she's right. 
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#9
10-12-2001, 06:15 PM
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I am not sure I answered your question.
Some of the member remove the resistor that is used to control the line pressure in the transmission. Normally the line pressure is controlled by the Transmission Control Unit (TCU) and this is a computer. The signal for line pressure is sent to solenoid "A" from the TCU. When there is no power to the solenoid "A" the line pressure is at full. So the TCU regulates the line pressure to less than the maximum. In normal driving the voltage is high and when hitting the gas the voltage goes down. It cant get any lower than zero. When the resistor is removed, the TCU thinks the resistor is bad. In response to this it sends no voltage to the solenoid "A" and the line pressure is at maximum. Because the TCU thinks the "A" solenoid is bad, the self diagnostic system tells the system there is a problem. The next time the car starts the power light will blink and this means there is a problem. So anyway. The whole point to this modification is increase the line pressure without screwing up the TCU diagnostic system. By using different resistors the system could be customized for what you want. There are a lot of post in the history file about taking out the resistor.
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#10
10-12-2001, 08:12 PM
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Quote:
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#11
10-13-2001, 12:11 AM
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Quote:
I hate to be the a$$ in the crowd and but I have one more question. My resistor is shot -- as I have said earlier. Can I just go the local radioshack and get a 10.5 Ohm resistor and do a // connection to the shot resistor in the white stuff? Or is it going to screw up my TCU. I can not replace the TCU so should I just have the power light blinking? Lwin
__________________
Lwin M. Maung (Member # 147) Current SVX: NONE Previous SVXes: 1994 LE Barcelona Red 107k 1992 LS-L Pearl White 143k 1994 LSi Bordeaux Pearl 220k 1992 LS-L Ebony Pearl 184k 1992 LS-L Liquid Silver 145k 1992 LS-L Liquid Silver 102k 1992 LS-L Ebony Pearl 123k Other current cars:2001 Jeep Grand Cherokee Black If at first you don't succeed, CHEAT!
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#12
10-13-2001, 12:49 AM
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Quote:
Lwin, you'd probably be better off going to a salvage yard and grabbing a resistor off a Legacy (do a search on posts by "richeich" for exact application). You may have to do a bit of wire splicing, but, it would be a better "fit" and you'd not have to worry about frying your TCU.
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Randy Johnson 3rd Registered Member 02-21-2001 First Member to Reach 10,000 Posts First to arrive at the very first Reading Meet Subaru Ambassador 1992 SVX PPG Pace Car Replica 110+k 1993 White Impreza L 240+K miles 2001 Legacy Outback Limited Sedan 250+K miles 2013 Deep Indigo Pearl Legacy 3.6R 49+K miles "Reading is my favorite Holiday" Mike Davis -- at Reading VI
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#13
10-13-2001, 08:48 AM
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Hey Lwin, I've got that spare Legacy resistor that I experimented with out in the garage. If I can find it, do you want it? That way, it will be the right power rating, and able to handle the heat. I think we figured out in the past that it was pretty high wattage. That's why it's such a big resistor, mounted like it is to the fender, to help dissapate the heat.
Just let me know, I've got no use for it anymore.
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Rich '02 Toyota MR2 Spyder (Previous '93 SVX Owner)
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#14
10-13-2001, 09:29 PM
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Quote:
Yep, that sounds good to me. Before I sold mine, I had experimented with that as well. In fact, I still have my spare resistor around here somewhere. The funny thing is, I got it backwards and mounted it in parallel, which cuts the resistance in half. Okay, so no blinking light, but no improvement in the shifting either. I don't remember it feeling softer, though. It just felt the same as stock to me. It was after I sold it that it clicked in my head that I should've put them in SERIES! Duh. Like I said in the earlier post, the acceptable resistance range is apparently pretty broad. So I guess to the TCU, 5 ohms is basically as good as 10 ohms. It still gets a signal that tells it there is a connection. It kinda makes me wonder if you put two in series to get 20 ohms, and you feel an improvement, if putting 3 in series for 30 ohms would give even more improvement or finally trip the fault sensor. Interesting stuff.
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Rich '02 Toyota MR2 Spyder (Previous '93 SVX Owner)
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#15
10-13-2001, 10:23 PM
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Quote:
I would love to play with it. Lwin
__________________
Lwin M. Maung (Member # 147) Current SVX: NONE Previous SVXes: 1994 LE Barcelona Red 107k 1992 LS-L Pearl White 143k 1994 LSi Bordeaux Pearl 220k 1992 LS-L Ebony Pearl 184k 1992 LS-L Liquid Silver 145k 1992 LS-L Liquid Silver 102k 1992 LS-L Ebony Pearl 123k Other current cars:2001 Jeep Grand Cherokee Black If at first you don't succeed, CHEAT!
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