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Thanks guys. I haven't probed around with my multimeter yet; the values I listed came from Helms. I'll try to get actual values today. I'll let you know what I find. I'm taking the Bat in for her first dyno session this morning, so this should be a very interesting day, indeed.
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'00ITR#739
JRSC, JR Walbro FP, JR intake, J&S SafeGuard, JR BTC
Have any OBD-II's tried Raffe's trick yet? Holden?
I'm also wondering if the same resistors listed in Raffe's post will work on my car. Here's my concern: the voltage of the TPS wire at WOT on '00 Integras is 4.8V. This is an increase from the 4.5V that exists in '98 and earlier models. It's been too long since I took college physics (I vaguely recall that v=ir, or something like that), so I need some electronics advice. If I use the same value resisitors listed in Raffe's post, will my TPS wire carry enough voltage to send a true WOT signal to my J&S and ECU? I think I may need to use lower ohmage (is this a word) resistors to reach 4.8V on the TPS sensor wire at WOT, but then again, I may fall within acceptable parameters using Raffe's resistors. What do you guys think?
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'00ITR#739
JRSC, JR Walbro FP, JR intake, J&S SafeGuard, JR BTC
Have you checked your WOT TPS voltage with a meter ??? I do not know the max volts in a '96+ right off the top of my head, however, the '94-95 GSR has a TPS that reads from .5v to 5.00v !!! This would mean that the WOT reading would be at least 4.00v or more.
These readings will vary slightly, but they should be very close.
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'93 Civic Si H/B with B18C1, JRSC @ 8psi
Best 1320: 12.68 at 110 mph
Any OBD2 results on this mod yet? I'm waiting to place my order until I hear whether I should stick with the 2.2k or opt for a 1k resistor.
Let me know.
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'98 GSR JRSC with all sorts of high-performance, high-tech, overpriced stuff packed in all over the place.
http://www.donia.org/clandestine
Just checking to see if any 98 GSR owners have tried this yet?
MrRogers... Anyone???
Charlie
[This message has been edited by vincentc (edited October 31, 2000).]
can i get a short version of what this will accomplish, and if its safe to do? What could happen if disconnected CE light? Limp Mode? ??
Hate to beat an old horse, but I'm not quite comfortable installing Rafe's (newly approved by JR) TPS trick. I have the parts now from Radio Shack. First off, is this the correct relay and socket? part #'s90-2394 and 90-2396
http://albums.photopoint.com/j/View?...878&p=38853135
I also have the 2 different resistors and extra 14 and 18 gauge wire. I know a couple of guys have installed the TPS trick successfully. Could someone please explain in simpler (for my simple mind) terms how to hook it up? Much appreciation!!
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'00ITR#739
JRSC, JR Walbro FP, JR intake, J&S SafeGuard, JR BTC, v-afc
You have the right parts.
I've sent this to a few people. Paste it into wordpad to see it properly aligned.
Here it is:
Except for one wire listed as green/blue actually being green/black, Rafe's instructions were right on the money.
I don't have pics, but here's what I did. I didn't use any quick connectors or wire taps as I have no faith in those things lasting long. Also, my TPS wire harness had ZERO slack in it, so the extension were pretty much mandatory.
You'll need: Four sections of wire about 4" long and three sections of wire about 18" long.
- Cut all three TPS wires about 2" from the plug. Strip the three wires from the harness.
On a comfy workbench:
- Strip the three wires coming out of the plug.
- Make four 4" long sections of wire, stripped at both ends.
- Connect (twist together) two of the sections of wire to the two outside wires of the TPS plug. Wrap with tape.
- Connect (twist together) the other two sections of wire to the other two sections. Don't wrap yet.
At this point, you basically have extended two of the TPS wires by eight inches, with each wire having a nice place in its' middle to solder resistors to.
- Solder the resistors to the two wires and to each other. It matters which resistor goes to which wire, so check Rafe's instructions.
- Solder a new, long wire to where the two resistors meet.
I'll try a crude graphic here:
=========|---x---1---x---2---
=========|oooooooooo| r1
TPS PLUG==|---ooooooox---5---
=========|oooooooooo| r2
=========|---x---3---x---4---
(the o's are just filler)
x's are twist/solder connections. 1,2,3 and 4 are the short sections of wire you made. 5 is a long wire you made. Another, non-depicted wire will run from the center wire of the TPS plug along with 5 to the
relay.
- Connect (twist together) another long wire to the center TPS wire (real TPS signal) from the plug. Wrap with tape.
- Connect (twist together) another long wire to the center TPS wire (goes to ECU) from the harness. Wrap with tape.
From this mess, three wires will run to the relay. One to the ECU. One with the real TPS signal and one with the 4.5V, fake TPS signal.
- Before fully wrapping or installing, use a multimeter to make sure nothing is shorted or not connected.
- Wrap each individual connection with tape.
- Bend the resistor wires carefully to get everything into a tubular shap and wrap everything together with tape.
Now this gizmo has the TPS plug on one end, two wires to attach to the TPS harness on the other end, and two wires (real TPS signal and fake TPS signal) coming out the middle to go up to the relay.
- Connect it to the TPS harness, wrap it and put it in some wire loom.
Now it looks like stock (with the addition of the wire loom) except that three wires poke out of the wire loom to attach to the relay.
On the relay socket I got from RadioShack, here's how the colors mapped. Check yours in case it's different:
Red (86) = +12VDC (blk/yellow wire on JR relay)
Purple (85) = Ground (black wire on JR relay)
Yellow (30) = To ECU
White (87a) = Fake TPS signal (middle of resistors)
Blue (87) = Real TPS signal
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Greg Holden
96 GSR, JSRC @6psi, AEM CAI/RSR 4-2-1/Greddy PE, Cartech 20005/Walbro GSS-342/TPS Mod, JR BTC, KYB AGX/H&R OE Sport/ST 19mm Rear Swaybar
Best 1/4 ==> 13.937 @ 101.41mph
My JRSC Install Site
[This message has been edited by Holden (edited January 22, 2001).]
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by rjaffey:
(1) 22K Ohm resistor, 5% or better tolerance.
(1) 2.2K Ohm resistor, 5% or better tolerance.
<HR></BLOCKQUOTE>
Does anyone have the part numbers for these two resistors, i want to make sure i get the right ones? And I can get this from the store and not the website correct?
2K2 ohm resistor, part # 90-387
22K ohm resistor, part # 90-411
The above #'s are from the on-line catalog. I actually found the resistors on the shelf, but they have different part #'s"
2.2K ohm resistor, part # 271-1121
22K ohm resistor, part # 271-1128