Need Help on 91 SI Hatch

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Old Dec 3, 2009 | 03:52 PM
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I LUV MY EJ1's Avatar
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Default Need Help on 91 SI Hatch

ok well i have a D16a6 longblock and was wondering if i can use a Z6 intake manifold...also wanted to know if i could use another engine harness instead of the SI one also would i be able to use a d15b2 Dizzy
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Old Dec 3, 2009 | 08:39 PM
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Default Re: Need Help on 91 SI Hatch

Intake manifolds are interchangeable.
Engine harness....why do you want to change it? Not sure of what would work as a direct replacement but a DX one would work as long as you convert it to run MPFI, I'd imagine an OBD0 integ one would work but it may need some modifying here or there...
D15B2 distributor is not compatible (it's missing a sensor needed for the Si)

If you read in the FAQ you'll see that it seems it's easier to convert a DPFI to MPFI rather than transplant the whole MPFI harness to a DPFI car. I don't know what's different between the two on the car side but based on that, if your car is already an Si then it would make sense that the difference goes both ways (in otherwords use an Si harness since your car is an Si).
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Old Dec 4, 2009 | 05:32 AM
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Default Re: Need Help on 91 SI Hatch

yeah just use the si harness....already mpfi..done.
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Old Dec 4, 2009 | 11:40 AM
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Default Re: Need Help on 91 SI Hatch

Originally Posted by 24TEN
Intake manifolds are interchangeable.
Engine harness....why do you want to change it? Not sure of what would work as a direct replacement but a DX one would work as long as you convert it to run MPFI, I'd imagine an OBD0 integ one would work but it may need some modifying here or there...
D15B2 distributor is not compatible (it's missing a sensor needed for the Si)

If you read in the FAQ you'll see that it seems it's easier to convert a DPFI to MPFI rather than transplant the whole MPFI harness to a DPFI car. I don't know what's different between the two on the car side but based on that, if your car is already an Si then it would make sense that the difference goes both ways (in otherwords use an Si harness since your car is an Si).
ok what if i have obd1 injector do i gotta get the obd0 ones or i can use dem..........and i having trouble finding a Si harness at the junk yard or around here....that why i ask if i would be able to use a different harness Because i need the under dash harness n engine harness

Last edited by I LUV MY EJ1; Dec 4, 2009 at 11:47 AM.
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Old Dec 4, 2009 | 11:47 AM
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Default Re: Need Help on 91 SI Hatch

Use an SI harness or the CRX HF harness. Both are MPFI. Sweeet sauce ain't it?
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Old Dec 5, 2009 | 06:36 AM
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Default Re: Need Help on 91 SI Hatch

Originally Posted by I LUV MY EJ1
ok what if i have obd1 injector do i gotta get the obd0 ones or i can use dem..........and i having trouble finding a Si harness at the junk yard or around here....that why i ask if i would be able to use a different harness Because i need the under dash harness n engine harness

WHY the dash harness?? im still confused as to why ppl have to swap that out..
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Old Dec 6, 2009 | 11:30 AM
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Default Re: Need Help on 91 SI Hatch

Originally Posted by hatchet_honda
WHY the dash harness?? im still confused as to why ppl have to swap that out..
i forgot to mention that my dash harness is all cut up n since i cant find the engine or dash harness of SI at the local Junkyard i wanted to know what other harness can i use
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Old Dec 6, 2009 | 11:42 AM
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Default Re: Need Help on 91 SI Hatch

dash harness is not the same as the front body harness. the literal dash board harness, that sends power and signals to your cluster, clock, radio, heater controls, and multifunction switch, plug into the fuse box, and are not changed body style to body style, only year to year. if you are saying that your front body harness, the one that runs under all the foam, hooks up to your ecu, sunroof, blower motor, wiper motor, front running lights, front signals and headlights is chopped up (which it shouldn't be) then you would have to either convert a dpfi body harness to mpfi, along with the dpfi engine harness, or find another si body harness.

as far as the engine harness goes, if you have any soldering skills, just repair your current engine harness. not hard to do.
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Old Dec 6, 2009 | 12:31 PM
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Default Re: Need Help on 91 SI Hatch

Originally Posted by I LUV MY EJ1
i forgot to mention that my dash harness is all cut up n since i cant find the engine or dash harness of SI at the local Junkyard i wanted to know what other harness can i use
why the eff is it cut up? did you do it? shouldnt even have to mess with it...
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Old Dec 6, 2009 | 02:34 PM
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Default Re: Need Help on 91 SI Hatch

Originally Posted by DCRB
dash harness is not the same as the front body harness. the literal dash board harness, that sends power and signals to your cluster, clock, radio, heater controls, and multifunction switch, plug into the fuse box, and are not changed body style to body style, only year to year. if you are saying that your front body harness, the one that runs under all the foam, hooks up to your ecu, sunroof, blower motor, wiper motor, front running lights, front signals and headlights is chopped up (which it shouldn't be) then you would have to either convert a dpfi body harness to mpfi, along with the dpfi engine harness, or find another si body harness.

as far as the engine harness goes, if you have any soldering skills, just repair your current engine harness. not hard to do.
i dont have a engine harness n my dash harness the one the all cut up

Originally Posted by hatchet_honda
why the eff is it cut up? did you do it? shouldnt even have to mess with it...
n i didnt f*** it up i bought the shell like that do you really think i would cut up a harness that i would need
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Old Jul 1, 2011 | 10:44 PM
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Default Re: Need Help on 91 SI Hatch

yo i got a 91 si hatchy with 1.6 sohc non v-tech zc but my under dash harnes is all fukt up i bought it like that i tryed the 91 crx si harness nd is diffrent i even tryed putting an 87 si but no luk anybody know if the ex dash harnes plugs will fit to the engine harnes or wich ones will fit nd from wich yea plzzzzzz help i jst wanna start it up so i can bring it in my shop so i can start puting **** toghrther any suggestions???
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