2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Modded harness

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Old Oct 11, 2009 | 01:55 PM
  #1  
Brian FC/Si's Avatar
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From: New Bern, NC
Modded harness

Is there somewhere I can buy a harness thats already modded for a na to turbo 2 swap?
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Old Oct 11, 2009 | 04:40 PM
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dawicka2's Avatar
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From: NY
If you have an s5 its already done.


If you have an s4 extend your tps wire.

Done and done.

john ny
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Old Oct 11, 2009 | 05:01 PM
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Send me $150.99 and I'll mod it for you. Cash up front, please. Shipping and handling extra.
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Old Oct 11, 2009 | 05:07 PM
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need RX7's Avatar
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I'll do it for 149.50 .


I do have a kind of on-topic question though; I extended the TPS wires on my harness in preparation for a future TII swap, what should the resistance on the wires be? I tested them with a multimeter, with one probe in the TPS terminal and the other in the corresponding pin on the ECU plug. I got ~5k ohms on the top 2 wires (the ones side-by-side on the TPS plug). This doesn't sound right to me, did I do a bad solder job or something? I've been meaning to do the same test on my other car with the unmodded harness but I've been busy and the weather has been bad.
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Old Oct 11, 2009 | 05:42 PM
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HAILERS
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Hard to say. ONe wire is brown/white and goes to numerous sensors plus the pin on the ECU and the same can be said of the brown/black (might be pure black) 'cause it goes to numerous sensors in the engine bay.

But it does not sound right. I might look tomorrow and do what you did. I'll do it on my non turbo car 'cause I won't have to remove a intercooler that way. Should be exactly the same thing though.
Attached Thumbnails Modded harness-tps.jpg  
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Old Oct 12, 2009 | 09:19 AM
  #6  
Brian FC/Si's Avatar
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I might be getting a s5 (ill keep my s4 vert na then)....so the na s5 harness will plug in perfectly with a s5 turbo 2
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Old Oct 13, 2009 | 03:14 PM
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Originally Posted by Brian FC/Si
I might be getting a s5 (ill keep my s4 vert na then)....so the na s5 harness will plug in perfectly with a s5 turbo 2
As long as you run the s5 Na harness with the s5 NA ecu you shouldn't have a problem running it on a s5 TII motor. You can't run a s5 NA ecu with a s5 turbo harness and visa versa unless you modify the harness immensely and its not worth it. Same thing would go for s4 harnesses and ecus. I personally when i did my swap just ran a Turbo harness and turbo ecu. I mean if your gunna buy an S5 turbo 2 motor i would hope you would wanna get the ecu and harness with it.
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Old Oct 13, 2009 | 09:49 PM
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From: elmhurst ny
hey, while on the topic of modded wires, Does any one how to tell the difference between the primarys and secondaries on the TurboII harness? I understand left and right placement of the actual connectors dont matter (on their proper fuel rail) but i suddenly forgot which ones go where! i know im a noob. Basically theres fours plugs two shorter and two longer ones. Can someone please help me? thanks!
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Old Oct 13, 2009 | 10:55 PM
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From: rohnert park , ca
Originally Posted by MXRXRicky
As long as you run the s5 Na harness with the s5 NA ecu you shouldn't have a problem running it on a s5 TII motor. You can't run a s5 NA ecu with a s5 turbo harness and visa versa unless you modify the harness immensely and its not worth it. Same thing would go for s4 harnesses and ecus. I personally when i did my swap just ran a Turbo harness and turbo ecu. I mean if your gunna buy an S5 turbo 2 motor i would hope you would wanna get the ecu and harness with it.
This is a misleading comment, to run the s5 na harness on the tii ecu, the only 2 things you have to do is run one sheilded wire from the knock sensor to the ecu then cut off one of the solenoid plugs(I can't remember off the top of my head but I believe it was the blue or white plug and then solder the boost solenoid plug on those wires just match the colors, you can skip the second mod if your running an aftermarket boost controller like an avc-r. So really you can do it with only running one wire.
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