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Old 07-23-2012, 07:44 PM   #1 (permalink)
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CRX:HF - '89 Honda CRX HF
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MPGuino in CRX

Alright, so I couldn't find the information any where else.. I have a 1989 CRX HF and I can't figure out what injector to tap into and where the vss line is located.... Any help would be much appreciated.
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Old 07-23-2012, 08:23 PM   #2 (permalink)
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This might be helpful : crxMPG – Gas mileage never looked so good SuperMID: Fuel Economy Display
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Old 07-24-2012, 12:40 AM   #3 (permalink)
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No I've read that before. It doesn't tell me what wires to get in to.
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Old 07-24-2012, 03:56 AM   #4 (permalink)
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tuned2save - '93 Honda Civic VX
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this might help. OBD0 pinout diagram on honda-tech.
looks like B16

Obd0 Pin out - Honda-Tech
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Old 07-24-2012, 12:12 PM   #5 (permalink)
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My B pinpoints are different than that... I have that photo..
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Old 07-25-2012, 04:58 PM   #6 (permalink)
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does your ecu have 2 or 3 plugs? honda OBD0 pins should be standard across the board. is it possible the previous owner did a swap on the harness and ecu?

pics will help
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Old 07-25-2012, 07:21 PM   #7 (permalink)
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3 plugs. Previous owner didn't have an ECU and he said that he didn't swap anything..
I'll post photos tonight..
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Old 07-25-2012, 09:11 PM   #8 (permalink)
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if it's 3 plugs, it's a OBD1 ECU/harness. check the OBD1 diagram here

ECU Pinouts, VTEC wiring, & ECU VTEC Conversion Information - HondaCivicForum.com

if your B10 is yellow/blue or orange color wire, then that's the one for your VSS

while you're at it, you can also check the ECU number and see which one your CRX is running to verify that it's a OBD1
Honda ECU List - HondaSwap Forums

if you're engine isn't original, check the engine model stamped on the block. here's a list of honda motors to triple check your OBD1
Honda Engine List - HondaSwap Forums

Last edited by vt_eg; 07-25-2012 at 09:37 PM..
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Old 07-25-2012, 11:26 PM   #9 (permalink)
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Mine looks like that obd0 one. Not the obd1
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Old 07-27-2012, 03:16 PM   #10 (permalink)
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Here's my ECU and wires..
Quick photos.. sorry for the lack of detail.




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