D16A1 Into a 91 Si Hatchback - Need Help!!

Ok so i got the thing in, it turned over ran rough for a sec then died. I heard this swap was just plug and play. Well I got most of everything hooked up to the best of my knowledge. There are two harnesses that do not match on the driver side by the firewall. One plug comes from the harness coming from the fuel injectors and is a rectangle 6 prong plug and the othe comes from the firewall on the driverside which is a circular 8 prong plug. Do they need to be spliced or whats going on with them? Also im having problems with the vacuum lines. not sure what goes where. the only ones i dont have hooked up are the two larger L shaped one that come out from the back of the intake manifold. My ECU is throwing 4 codes 1. Code 6-ECT-Water Temp Sensor 2. Code 10-IAT-Intake Air Temp
3. Code 9- #1 Cylinder Position And 4. Code 16- Fuel Injectors.
Keep in mind im not very car savy. This is the first time Ive ever done this kinda thing. Any help would be much appriciated.

This is where Im at so far
http://a137.ac-images.myspacecdn.com/images01/49/l_f17f8428ac7e33a6c263fdc6e7ecb048.jpg

Good closer view
http://a687.ac-images.myspacecdn.com/images01/117/l_d8d66c5ef4dde956902476032666491e.jpg

These are the harnesses i was talking about
http://a645.ac-images.myspacecdn.com/images01/35/l_fba0cf0120b7b101a852bef53c8656d4.jpg


And this is one of the lines on the back of the intake manifold
http://a576.ac-images.myspacecdn.com/images01/72/l_b4a261ab3667ddd8a65d30bf9a095c27.jpg


This is my 91 Si which the motor just went into.
http://a476.ac-images.myspacecdn.com/images01/62/l_ee0ec9cf4bf8f90653a3fdff5c924cab.jpg

This is my donor car which the D16A1 came out of.
http://a668.ac-images.myspacecdn.com/images01/12/l_07752869b4a93c01f97aea8104238ccb.jpg

Thats a b18...

are you sure? cause on the block it says D16A1

Oh damn dude, sorry yeah you got that thing. The dohc d series. How in the hell did you get it into the car?!

Well after a lot of cursing and screaming I somehow managed to drop it in with a hoist by myself. The only problem with getting it in is the mount on the driver side had to be modified and still it sits kinda high.

Yeah that mount is what I was referring to.

I wish it was a B18 though

Yeah where it bolts to the engine i had to shave down some of it so it wouldnt hit the cam gears

What engine harness are you using? the D16A1 or the one that was in your car?

The stock Si harness

Also if you have to ask why i did this swap its because i had no other choice, simply put. My stock si engine threw a rod and blew a hole in my block. Its ok though because the engine had over 300,000+ miles on it. Plus Ive had the same car for the past 7 years now so it means a lot to me. Just in case you all were wondering.

Doesn't make sense to me why you don't have the big round plug on the left side, considering its a main plug(has your fuel injectors on it). Seems like you just have a wiring issue somewhere...I had some wiring problems and had a ton of codes because of it...was also because my IAT sensor was bad too.

Here are the plugs that dont match. Now there were 2 plugs that came from the injectors on the harness. One plugs to the, i think its the resistor(the silver thing down at the bottom right of the pic) and thats pluged in. But now im stuck with these two
http://a25.ac-images.myspacecdn.com/images01/125/l_85dff297e699c8a9016bb916866ab358.jpg

And here are the line that i have no idea where they go
http://a276.ac-images.myspacecdn.com/images01/38/l_daf0003afcfba60c2db6dc4118d0d32b.jpg

Where would the IAT sensor be located?

On the manifold, usually the backside or drivers side of it. It's screwed into the manifold with two screws and just a single 2-pin round plug sticks out. You can plug those nipples on the manifold. And if your using the stock factory SI harness, and they both came from your car..why in bloody hell dont they match after you took em apart.

Thats what I'm wondering. If the Engine side of the harness is your stock harness, why isn't matching up? is the plug hiding somewhere or something. You don't need to use the A1 harness, just use your stock harness with it and if you need to extend or move some wires, move it on that harness.

Like Frodo said, its located either on the backside of the manifold or on the topside towards the drivers side. Its held in with 2 philips screws usually, might have to take an impact driver(not an air impact) to break them loose. The sensor itself is usually white. But before you go replacing it, get your harness straightened out. You missing a lot of main wires without that round plug being hooked up.

I'm not even touching this one.. that engine shouldn't have bolted to a Si tranny... it should have been a couple bolts that were off.. unless they used the 'teg tranny w/ the engine, but even then, you should use the harness that came off the Si engine, you'll only need to move two wires, for the CPS

Its the old teg, d series, dohc d16a1.

yeah, I know, and it shouldn't have bolted to any D-series tranny... I've done hours and hours of research on that engine, b/c you CAN put it in the 8-91 cars, and it's not that hard, but it requires drilling a hole and making a wierd bolt to mount to the tranny, and custom fitting a new front mount.. it's not worth it.

If he's using the 'teg tranny, it would be alot easier, b/c then it's just the front mount that needs to be messed with, the rest of them should pretty much just line up.

BTW, original poster, take a couple 1/4" washers, and put them between the two parts of the front engine mount, that will solve your height/angle issue.

You can bolt it up, just a couple places won't line up. The 1g/3g guys do it often to get a newer D series in their cars without having to make axles for them.

Front mount? lol, I don't have one of those, lol.

funny thing is i havnt the slightest clue on what tranny is, some one scraped off the tranny code. Anyways the yellow civic it came out of was a 88 DX, so the wire harness was different on the other car. And on the tranny i know its not the teg tranny since only one bolt does not line up to the block.

i can get pics of anything on the engine if it would help you guys out and clear up some of the debates. just let me know i'll get them up later this afternoon

oh and sorry for the mix up earlier on the harness. The engine harness is the D16A1 harness and the harness from my ECU is my stock Si one.

Alright, you need to get your stock SI engine harness and use it, thats where your having issues. Its always easier to use your stock engine harness than trying to use the harness for that engine.

yeah, cuz now it all depends on what kind of engine that was to begin with.. if it's the '86-'87 teg motor, you're going to have a problem... you'll need to get a DPFI dizzy, b/c that one is going to be vacuum advance. (you'll need to make a small adapter to use the DPFI dizzy tho.)

if it's the '88-'89 teg motor, you're fine on that end, it's electronic advance already, and most of the sensors should be the same. make sure you leave the oil cooler on the back of the engine, and hook the water lines to it.

Well i still have the harness from the donor car and also the ECU which is a PG7 ECU. Here are some pics from the donor car engine bay. Hopefully it will help determine what teg' it came out of, or what i still need from the donor.
http://a87.ac-images.myspacecdn.com/images01/123/l_ee4cad4f716d4beef0c3d0d8fcd8a2f6.jpg

http://a17.ac-images.myspacecdn.com/images01/69/l_7cd74c8acb1e030410eccd2972ee0010.jpg

http://a112.ac-images.myspacecdn.com/images01/95/l_e1e454395cba4dc4d0225bcc788f0aaf.jpg

http://a243.ac-images.myspacecdn.com/images01/42/l_5d639d0fbbce89006cb09350f2980922.jpg

The donor car wasnt an Si Was it? If your trying to slap a converted harness from a dx onto your SI your on crack lol. Look, forget the donor. Use YOUR original harness that came off whatever engine was already in YOUR car, it will all plug in.

ok there is a problem there since i dont have the harness from my old engine. Dont ask what possesed me to get rid of it. yes i know im a dumbass. Well none of the wires on the D16 engine harness have been spliced or modified and are completly stock. So im gonna have to work from there.

Problem is then that the harness is from the integra if I follow right. Worse is that its not even from a 90-93 integra, that damn engine came from an 80's integra.

yup that kinda covers it. i know its a pain in the ass. but i really dont have any other options right now so i have to get this to work. well im almost 99% positive its from an 89 teg'

Yes you do still have an option...get you another harness from a 91 Si. Its less of a headache that way. If you want to keep the A1 harness, your gonna need a wiring diagram for it and one for your hatch and match them up...meaning cutting the engine harness open, moving wires around, probably extending wires, and figure out what to do about the plugs...if you don't have the other end of the round plug, your gonna have to take the plug from the donor car and cut the round plug on your hatch and make it work.

Much easier to find another engine harness. Check your local junk yards.

89 teg, you're doing good... at least you have electronic advance... like 6 wires on the dizzy.

OK, go get a Si engine harness from a junkyard or something... hell, actually, an HF engine harness will even do it for you, as long as it's MPFI.

You'll still have to move two wires from the dizzy plug on the engine harness and the body for the CPS that's on the intake cam of the engine you're using... good luck w/ this.

Just make sure its from a 90-91...I would try to and get a 91 if you can. The wires changed around between 88-89 and 90-91s IIRC....don't think they changed anymore from there though.

I dunno dude, I tried to fit a 91 si interior harness into my dx and it was so ass backwards it wouldnt even start, and if I remember right it didnt even crank. The pins were all off. Like the fact that my rear harness hada different size plug, with different amounts of wires, and different pin locations. I imagine if I swapped every wire in the car for the SI it would have worked great. The engine harness though I believe is ok.

body harness is diff, I know that. but I have time and wiring diagrams, so it doesn't bother me to do that shit... I do it all the time anyway when I make custom computer parts... switch wires and shit, then try to get stuff working the way it's supposed to.. or better yet, the way I want it to.

well i have a freind from a local performance shop comin over later to see what we can figure out. i'll let you guys know how it goes. lucky he knows civics like the back of his hand. as for finding an Si harness i checked with most junk yards in the area and couldnt find one anywhere same with the HF harness. and any si they had, had all ready been gutted completly. hell i even went over to orlando to try and find some today and still no luck. well i guess if any one knows where to get a 89 teg' wiring diagram i need it, cause it looks like im going to do some crack and try to wire this damn thing up. wish me luck

Aww cool dude, another floridian here. Good luck with it man.

it shouldn't be TOO hard... just requires changing some wires around in the plugs, for the most part.

it would just have been less of a headache (this is for future reference as well) if you had kept the engine harness from the old engine...

Best bet right now, if you're trying to do this on your own, or even w/ help from someone else, get yourself a HELM'S manual... not HAYNES.

Chilton would be the next best bet for wiring if you can't find a helm's.

well i have a helms for the Si just not for the teg so i guess ill see what i can find

Like I said, if you can't find the Helms for it, just get a Chilton manual from AutoZone or Advance... Haynes would work, but damn, they're shitty manuals.. the electrical diagrams are usually half hand-drawn and scanned, and they're almost always generic in quality.

It depends on what vehicle Drop...Haynes and Chiltons are about the same from what I can tell. The wiring on my 91 in Haynes is shit, but in my Haynes for the 92-95 Civic, its a great diagram.

It might be more than just swap wires around plugs. One of the main reasons everyone says to keep your stock harness is because some wires originate from different sides of the engine bay on different harnesses. If it was just swapping pins around the plugs, it wouldn't be that big of deal.

well the way it is lookin at the moment i think i might just scrap the whole project for a few months till i can afford a B16 or B18 im leaning towards the the B16 though. it all depends on how much of a headache i have when the day is done today.

well, when you do the swap into a '86 SI, it's drop in, plug and play.. I think the wires term on the same side, at least most of them... but yeah, agreed, it's always better to keep your harness.

@ OP... since I got the engine for free, you've inspired me... I was going to throw this engine in my other CRX, but it's actually quite a quick swap when you have an Si harness laying around... (I do), so when I get the engine, I'll just change the seals and gaskets, and put it in my Civic LX. :D Thanks man, and good luck w/ this swap on your end.

true that. yeah it just became too much of a hassle so i gave up on the D16. Now my plans are to just start gutting and preping the 91' Si for the new B16A1. I should have the engine in about 2-3 months. until then its gonna be nothing but preping and painting.