*yes i searched*
Alright I built a OBD2a to OBD1 conversion harness for my 96 civic with a d16y7(stock) and now I throw a code 14. It appears that there is a IACV fix but seems to pertain to B series swaps only. But I also have been told I need to swap out my 3plug IACV for a OBD1 2plug. Is this correct?

 

I heard the 3 plug ones are for auto's only. . .

 

i have a manual and its a 3 plug.
what i have

obd1

 

I have the same issue w/ my 6th gen accord - 3 wire rotary-type IACV.

The only fix I know of in my case is to switch to a 2-wire IACV. That's one of the reasons I just bought an AEM EMS rather than do an OBD1 swap.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by notoriousB &raquo;</TD></TR><TR><TD CLASS="quote">I have the same issue w/ my 6th gen accord - 3 wire rotary-type IACV.

The only fix I know of in my case is to switch to a 2-wire IACV. That's one of the reasons I just bought an AEM EMS rather than do an OBD1 swap.</TD></TR></TABLE>
wow what you pay for AEM EMS this project will only cost me:
$25 ecu
$30 conversion harness
$25 chipping parts
$65 chip burner
$50 if i need a y8 or 92-95 intake manifold to get 2pin IACV
$00 for my time, i enjoy this stuff
--------------------------------------------------------------------
$195 Total

 

YOur problem is that your Y7 IAC is a 3 wire..the OBDI IAC is 2 wire..so you need to convert from a 3 wire to a 2 wire.

Follow this..it explains how to do the conversion.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fjt &raquo;</TD></TR><TR><TD CLASS="quote">YOur problem is that your Y7 IAC is a 3 wire..the OBDI IAC is 2 wire..so you need to convert from a 3 wire to a 2 wire.

Follow this..it explains how to do the conversion.</TD></TR></TABLE>
thats fine and dandy but how do i hook up the obd1 IACV to my obd2 manifold they are completelty different. look at the picture above of the two. iam being told i need y8 intake manifold or 92-95 manifold. is this correct?

y8 manifold and IACV


92-95 manifold and IACV


so it looks like i can use either the y8 or 92-95 manifold and use the 2pin IACV off the 92-95, is this correct and is there any more options?

 

you dont have to hook up an obdi IAC you just need to modify the wiring on your existing IAC..you need to get an OBDI IAC plug and re wire..The orange cable is eliminated.

 

so i can just cut the orange plug? cause if i wire in the 2pin IACV plug i have nothing to plug it into. what do i do cut all wires and wire the other two backwards?

 

bump for more imput, thank you.

 

Yes - you need a different manifold to fit a 2-wire IACV...period.

There is absolutely no way you will ever get an ECU designed to control a 2-wire, to cooperate with a 3-wire IACV.

So you need a 96-98 Y8 5-speed manifold (or 99-00 and fill the air injection holes) and its corresponding 2-wire IACV. You will also need the main engine harness plug (for the 2-wire) so you can graft this onto your existing 3-wire harness (the orange wire is left hanging).

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EE_Chris &raquo;</TD></TR><TR><TD CLASS="quote">Yes - you need a different manifold to fit a 2-wire IACV...period.

There is absolutely no way you will ever get an ECU designed to control a 2-wire, to cooperate with a 3-wire IACV.

So you need a 96-98 Y8 5-speed manifold (or 99-00 and fill the air injection holes) and its corresponding 2-wire IACV. You will also need the main engine harness plug (for the 2-wire) so you can graft this onto your existing 3-wire harness (the orange wire is left hanging).</TD></TR></TABLE>

ive came to that same conclusion i just forgot to post it up. now i have to find a y8 IM.
can i use my old y7 ecu to run the 2wire or is it incompatible too? i want to be able to go between obd2a and obd1. is this possible being the y8 is 2 wire and the y7 is 3?

 

is it the same for obd2b cars cuz my obd1 ecu was throwing that same code

 

you can get your 3 wire to work... Perform the IACV fix on the ecu and instead of disregarding th orange wire and do not touch the sensor side.... tap that into a ground on the ecu and viola the 3wire works using an obd1 ecu looking for a 2 wire IACV... BTW im running this on my car as we speak... NO CEL'S and care runs fine

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fjt &raquo;</TD></TR><TR><TD CLASS="quote">YOur problem is that your Y7 IAC is a 3 wire..the OBDI IAC is 2 wire..so you need to convert from a 3 wire to a 2 wire.

Follow this..it explains how to do the conversion.
</TD></TR></TABLE>

i followed this exact diagraphm when converting to obd1. fixed my problem :-)