like the title says, im swapping a 90 d16a6 into an 88 hf. i want to use the intake manifold from the 90 si engine. i would use the original 88 hf engine wiring harness correct? do i need to make any modifications to fit the connectors on the 90 d16a6? also, what ECU would work in this case? im thinking 88 si maybe? or does it not matter...?

thanks

 

yes you can use your original wiring harness you may have to add a few things im not completely sure....the best ecu too use will be the 88-91 civic/crx si the 90-91's are better cause there reprogrammable btw im selling one for $60.

 

You can use your existing harness and everything from the D16a6 should plug up. They are both MPFI.

 

Dont you also need the front spindals from a dx/si if you use the si axles.. I have heard the holes are different sizes..

 

so the best ECU would be any Si ecu from 88-91? would the 88 HF ecu work?

also, i have the front spindles from an Si to accept the Si axles.

thanks everyone

 

IIRC, the HF ECU will **** itself if you tell it to do MPFI. just spring for a 88-91 Si ECU. the code is PM6.

 

hf ecu is mpfi its just gotta shitty fuel curves and like a 5500 rev limit....go with the si ecu and get the si axles now too.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IggDawg &raquo;</TD></TR><TR><TD CLASS="quote">IIRC, the HF ECU will **** itself if you tell it to do MPFI. just spring for a 88-91 Si ECU. the code is PM6.</TD></TR></TABLE>

The pm8(hf) ecu is an mpfi ecu.. I think your thinking of the pm5(dx) ecu..

But yes, Just get the pm6(si) ecu and be done with it..

 

i'm wondering did the HF come with an injector resistor?

 

the 88 may not have a fitv and wiring...were the 90 manifold will have a fitv.

check the diagram under the hood to be sure.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CRX_1.8T &raquo;</TD></TR><TR><TD CLASS="quote">i'm wondering did the HF come with an injector resistor?</TD></TR></TABLE>

Yup.. The obd0 injectors are p&h so it would need a resistor box..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tgreaves &raquo;</TD></TR><TR><TD CLASS="quote">Dont you also need the front spindals from a dx/si if you use the si axles.. I have heard the holes are different sizes..</TD></TR></TABLE>

I think the axle from an HF plugs into the Si tranny.
Just use the HF axles and not the Si ones and the HF <u>KNUCKLES</U> can stay.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 4drEF &raquo;</TD></TR><TR><TD CLASS="quote">

I think the axle from an HF plugs into the Si tranny.
Just use the HF axles and not the Si ones and the HF <u>KNUCKLES</U> can stay.</TD></TR></TABLE>

Arent they smaller/weaker or something like that.. This is just from what I have heard..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fastcrxsi90 &raquo;</TD></TR><TR><TD CLASS="quote">the 88 may not have a fitv and wiring...were the 90 manifold will have a fitv.

check the diagram under the hood to be sure.</TD></TR></TABLE>

you mean the intake manifold im guessing? if i dont have the connector for the FITV, would it still be ok to run the 90 manifold?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rasta420 &raquo;</TD></TR><TR><TD CLASS="quote">

you mean the intake manifold im guessing? if i dont have the connector for the FITV, would it still be ok to run the 90 manifold?</TD></TR></TABLE>

yes and yes...

you will just have to disable the fitv so it doesnt turn into a vacuum leak.

i just saw this on how to do that...https://honda-tech.com/zerothread?id=976496