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89D15CRX
PostPosted: Tue Sep 15, 2009 10:08 pm 
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Location: New Brighton, PA
What are the differences besides the interior and ECU plugs? Can I just swap my 3G plugs onto the 4G harness? Are there any pinouts for the two with colors?
Basically I have a car that originally came with an 8 valve motor. I took off the 8 valve head and put a 12 valve in it's place. I don't have a 12 valve harness. I have ALL of the parts for the 4G37 but I NEED a 12 valve harness. Can I convert the 8 valve harness to a 12 valve harness using this 4G 12 valve harness that I have here? Is there ANYTHING I can do? Nobody can find a 12 valve harness for me.

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2006 Pontiac Vibe 1.8L 1ZZFE 132HP
1997 Honda Civic EX Coupe 1.8L DOHC TURBO
Conner 6/23/09 8 lbs 3 ozs 20.5 inches
Caleb 3/17/12 8 lbs 15 ozs 20 inches
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89Mirageman
PostPosted: Wed Sep 16, 2009 6:49 am 
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I would convert the 8v harness using the connectors from the 4g harness. Not sure if the colors are the same or not.

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redneck4g15
PostPosted: Thu Sep 17, 2009 6:30 pm 
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Location: vancouver/battle ground, wa
i beleave that the 4g 12v harness is different then the 3g 12v harness. when i swapped in my 4g 12v engine in to my 3g, the tb on the 4g 12v was different. hope these pics help.

4g
Image
Image

3g
Image
Image

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