I have a 99 Honda civic si with a 5th gen. motor. i blew the motor on it and I just bought a 4th gen b16a2 from japan. I want to know how do i connect the ecu to this new engine? i dont see any wires on the engine for it. Do I have to get an adaptor? If so where can i purchase one?

 

use the conviently located search button in the upper right hand corner of the screen.

 

you do need to do a search on everything before you post but im feeling nice today

you need an obd2 to an obd1 harness

 

I have an obd2 ecu that is in there stock. Would I need to change the ecu to a obd1 also?

 

jesus tapdancing christ READ
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civictildeath &raquo;</TD></TR><TR><TD CLASS="quote">you need an obd2 to an obd1 harness </TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civictildeath &raquo;</TD></TR><TR><TD CLASS="quote">obd2 to an obd1 harness</TD></TR></TABLE>

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

 

You still haven't answered my question. Would I need to change the ECU to from an obd2 to an obd1 also?

 

ok for 1 there is no such motor as a jdm b16a2, if its jdm its just B16

now for 2 you dont have to switch to obd1, its usually a better route to go but you can just use the stock ecu. you will need to put your wire harness onto the new motor. a few things may need to be added or changed but it should be easy.

It may be easier just to use your stock distributor and intake manifold

good luck

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Timmay &raquo;</TD></TR><TR><TD CLASS="quote">ok for 1 there is no such motor as a jdm b16a2, if its jdm its just B16a</TD></TR></TABLE>

Edit for ya

 

First of all your Si should be a 6th gen to begin with, not a 5th gen. 5th gens are 92-95.

Also I really wish people would stop calling B16A2 motors JDM, and calling actual JDM "second-gen" engines "B16A2" - it gets super annoying becuse you never know what engine they actually have.

Is your engine a B16A2, or is it a JDM second-gen B16A?

Help us help you, and help yourself by knowing the correct terminology.

 

It is a JDM 2nd gen b16

 

use your stock engine harness to wire the new engine. if something doesn't plug in, just replace that part with a part from your blown engine. THATS IT. you'll probably want to use the following parts from your blown engine: intake manifold, throttle body, altenator, injectors

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by KevinRad &raquo;</TD></TR><TR><TD CLASS="quote">It is a JDM 2nd gen b16</TD></TR></TABLE>

Okay if it's going into your 99-00 Civic Si, then you will need to use your engine harness and your intake manifold, injectors, distributor, and oil pump housing because it houses the OBD2 crank fluctuation sensor - the JDM engine will not have that sensor. you'll probably also want to keep your alternator, because I think the plugs are different - one is round, one is square.

Other than that it's plug and play really.