bloodspread
Offline
656 posts
1990 240sx fastback and a lame ass bike for school
claremont socal or UC Davis norcal ca
12-30-2005
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| « Re: just got an rb20 hatch and i have some questions (56k no go (bloodspread) | 8:34 PM 7/19/2008 |
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ok, I was looking at the wires again and some seem to come from the harness from the firewall and only 2 wires were labeled one said ecm power and the other said starter, now from the engine again only 2 wires were labeled one as starter and the other as alternator. my question is, do these get wired to the relay/fuse box? again sorry for the question, im new to this 
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S13 240SX
Offline
1035 posts
1991 Coupe - RB20 swap no more KA's for this coupe!
PA
12-8-2005
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did you read carl h's wire up guide? i know its confussing but its the only thing posted here on nico.
Car: Nissan
Year: 1991
Model: 240SX
Color: Crap White
Style: Coupe
Engine: RB20DET
Trans: 5spd
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Yellow4g63
Offline
2220 posts
Cars girls computers all things manly
Moreno Valley, Ca
1-20-2003
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| « Re: (S13 240SX) | 3:44 AM 7/20/2008 |
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Take the harness out of the car. Then put into a box with some good money and ship it to CarlH. He "might" be able to help you out.
SSautocrap http://www.bblgroup.us/ssautochrome.htm
http://www.protech-fabrication.com/
http://www.drag240sx.com/
| Quote, originally posted by NizzansDET » | | lol 12.8 A/F is rich dude! 14.7 is that prefect air fuel ratio. anything below 14.7 is rich and anything above 14.7 is lean! |
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craz4240
Offline
576 posts
1995 240sx w/rb20det
Waverley NS
9-13-2006
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| « Re: (Yellow4g63) | 7:57 AM 7/20/2008 |
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| Quote, originally posted by Yellow4g63 » | | Take the harness out of the car. Then put into a box with some good money and ship it to CarlH. He "might" be able to help you out. |
I second that,that harness is totally butchered.
The lower harness stuff ie: Wires to alternator,starter,transmission,oil pressure switch etc you leave pretty much stock with the exception of swapping over a couple rb plugs to the ka harness like the oil pressure and the starter sinal wire.Ream the ringed terminals holes larger so the fit on the rb compnents.And transmission stuff just swap over the ka speed sensor and I can't remember if the rb reverse switch is the same or not I do think it is,my trans had this broke off to begin with. Then all the EFI stuff like said take it out of the car and send it to Carl it will cost a couple bucks but it will work.
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bloodspread
Offline
656 posts
1990 240sx fastback and a lame ass bike for school
claremont socal or UC Davis norcal ca
12-30-2005
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| « Re: (craz4240) | 11:25 AM 7/20/2008 |
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I am planning to swap this out and put it into another shell, would I be able to use the same altered harness on the other shell? but first I want to try to turn the engine on to see if everything works or if i have to do some work to it while its out of the car.
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bloodspread
Offline
656 posts
1990 240sx fastback and a lame ass bike for school
claremont socal or UC Davis norcal ca
12-30-2005
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| « Re: (bloodspread) | 11:19 PM 8/2/2008 |
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ok, I figured out most of the wiring, my last wiring question. in the wiring guide it says to connect the ecu power wire to a white cable from the fuse box, I noticed there were more than one white wire, am I supposed to connect the ecu power wire to the thick white wire or the thinner one? and where do these go?
 sorry for the noobish questions, im just new to this 
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Yellow4g63
Offline
2220 posts
Cars girls computers all things manly
Moreno Valley, Ca
1-20-2003
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| « Re: (bloodspread) | 2:33 AM 8/3/2008 |
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look like heater hoes to me.
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bloodspread
Offline
656 posts
1990 240sx fastback and a lame ass bike for school
claremont socal or UC Davis norcal ca
12-30-2005
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| « Re: (Yellow4g63) | 8:46 PM 8/3/2008 |
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anyone know which white wire im supposed to connect the ecu power to ? does it matter?  I hope to finish this tomorrow
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Yellow4g63
Offline
2220 posts
Cars girls computers all things manly
Moreno Valley, Ca
1-20-2003
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| « Re: (bloodspread) | 9:52 PM 8/3/2008 |
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Is it a constant power? or switching power?
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bloodspread
Offline
656 posts
1990 240sx fastback and a lame ass bike for school
claremont socal or UC Davis norcal ca
12-30-2005
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| « Re: (Yellow4g63) | 10:39 PM 8/3/2008 |
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since its the ecu im guessing switched but im not sure
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bloodspread
Offline
656 posts
1990 240sx fastback and a lame ass bike for school
claremont socal or UC Davis norcal ca
12-30-2005
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| « Re: (bloodspread) | 7:42 PM 8/4/2008 |
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Ok, so I went to a buddy's shop where they had a 240 with an rb20 and I checked which white wire they were using, so I spliced it into the same white wire on my car. so now I just have to finish extending the O2 sensor wires and splice in the fuel pump wire and I will be done with the wiring  I hope 
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bloodspread
Offline
656 posts
1990 240sx fastback and a lame ass bike for school
claremont socal or UC Davis norcal ca
12-30-2005
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| « Re: (bloodspread) | 6:58 PM 8/6/2008 |
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I have a new question, refer to my first post 
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1991 240sx w/ rb20det my new project