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Go Back   SR20 Forum > Main Forums > Engine Management & Tuning




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Old 05-06-2008, 06:55 PM   #1 (permalink)
qctuner
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Rewiring 32bit harness to B14 ecu...

I have the pinouts of the 2 ecu's (RR 32bit ecu from G20T00'/B14 ecu)... everything seems right except fot the IAC valve pins. On the 32 bit ecu, there are 4 pins for the IAC, on the B14 there is only one pin for Iac... Do i wire them all in one or what? Besides i've been able to figure it out and it should be ok... except for the iac....

Need advice
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Old 05-06-2008, 07:53 PM   #2 (permalink)
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It is a different valve. You have to use the b14 one and only need one of the wires.
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Old 05-06-2008, 10:14 PM   #3 (permalink)
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jwt has some wireing dealing with the b14s... have you looked over there info?
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Old 05-07-2008, 01:54 PM   #4 (permalink)
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I did search for a long time and never came up with an adapter that i could buy...
For the iac i cannot use the DET one since its a highport and i have to hook up DE lowport sensors... My de one is under the TB and the DET is on the other side of the intake...
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Old 05-07-2008, 02:15 PM   #5 (permalink)
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Originally Posted by qctuner View Post
I did search for a long time and never came up with an adapter that i could buy...
For the iac i cannot use the DET one since its a highport and i have to hook up DE lowport sensors... My de one is under the TB and the DET is on the other side of the intake...
Let me say this very clearly.

You can NOT use the B15 IAC. It does not work the same at all. You have to use a b14 one.

2 options:
1 - Remove and block off B15 one, remote mount B14 IAC and plumb with hoses and make adapter plate (I did this)
2 - Get and use a B14 intake manifold

Or just not use one at all if you don't make the B14 one work.
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Old 05-07-2008, 03:37 PM   #6 (permalink)
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So you did a DET swap in a B15?...
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Old 05-08-2008, 09:54 AM   #7 (permalink)
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So you did a DET swap in a B15?...
I have DE+T. Running B14 calum realtime ecu in my B15.
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Old 05-08-2008, 12:04 PM   #8 (permalink)
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Quote:
Originally Posted by wnwright View Post
I have DE+T. Running B14 calum realtime ecu in my B15.
Since you've done a step-down before- is there any reason you can't go B15->B13?
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Old 05-08-2008, 01:31 PM   #9 (permalink)
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Since you've done a step-down before- is there any reason you can't go B15->B13?
None at all. Would be easier since there are less wires to transfer.

Only reason I didn't go that route was plugin emissions testing here.
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Old 05-10-2008, 02:52 PM   #10 (permalink)
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Got it... i'll do it this way. I want to run the DET with turbo unplugged to see if the engine works at first, so i'll remote mount the IAC from the RR motor to the DET intake... this way i'll can make the engine run with the RR ecu and sensors... and then when i'll know that the engine is ok i'll do the wiring of the b14 ecu, get B14IACV and get realtime so if something happens with the wiring i'll know it's bad wiring.

-Think this will work, what do ya think about that? i can run the det without turbo with RR ecu ? (probably cel's but i dont really care)

-Does all the sensors of the RR motor compatible with B14 ecu except for the IAC??

Last edited by qctuner : 05-10-2008 at 02:56 PM.
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