*************In need of wire harness GURU!!!! (pictures included)
 

Attachment 30158





Ok, so i swapped a B18a1 into my 95 coupe.

Going from OBD-1 to OBD-0

I had the Wiring harness from both the B18a1, and the D16z6... I found it easier to wire up my civic harness than the B18 conversion... But i have a couple questions.... There are three extra plugs from my D16 harness left over, and a couple plugs on the B18 i'm confused about

What do these plugs FROM THE D16 CIVIC harness plug into?
One plug has a yellow one red wire, this is the Purge Control Solenoid. Where do i plug it into the B18? Does the B18 even have one??

the other has one green and one black wire. According to the honda manual, this is the "Coolant Temp SW" what ever that is.

And the last sensor i need to know about is the Elect Air Ctrl Valve (EACV) Solenoid. Where does this go on the D16? Does the B18 have this?? The wire colors are Blue w/ Yellow stripe, and a Yellow with Black stripe.

If i can figure out where these plugged into on the D16, i can figure out where they go on the B.
Here are two pictures:
Attachment 30159
Attachment 30160



Here is the second problem:
On the back of the B18 block, there is the oil pressure sensor, and the green plug, and another two prong sensor type thing.... what plug (color wires) go into that green plug? I forget.
This info would help ALOT.

Attachment 30161




And Lastly... On the B18: On the back of the block, are two nipples, I assume these are for coolant flow for the mechanical speed sensor? Do i need to block these off if i'm using my electrical sensor from the D16?
Attachment 30162

Attachment 30163
(i also assume that the plug next to the two nipples is for the speed control? Am i wrong?)

Re: In need of wire harness GURU!!!! (pictures included)
 

Nobody knowsssss???

Re: *************In need of wire harness GURU!!!! (pictures included)
 

the purge solinoide is mounted on the firewall in obd0 cars so you will need to find a place to mount yours and plug it in. it doesnt need to do anything, just be plugged in.

the plug with the green and black wire is for a coolant sensor that wont be on the b18. its only on obd1 cars

the 2 nipples on the speed sensor are for power steering fluid for speed sensitive power steering

the pic with the red arrows is a knock sensor, if you are using the civic ecu to run the engine then you dont need it. the plug next to the 2 nipples is the Idle Air Control Vlave. you need to run coolant to those lines, but dont worry about the 3rd one in that same pic. its not neccesary.

Re: *************In need of wire harness GURU!!!! (pictures included)
 

That helps alot~

Now what about the sensor on the rear of the block w/ the two electric prongs coming out of it??

next to the oil filter location, and next to the oil pressure sensor?

Re: *************In need of wire harness GURU!!!! (pictures included)
 

its a knock sensor. it depends on what ecu your are using if you need it or not

Re: *************In need of wire harness GURU!!!! (pictures included)
 

I'm using my chipped P28. Tuning w/ Crome.


Anyone have a good basemap? I'm talking with stock ignition maps and stock fuel maps, i'll add boost tools and rev tools and injector / map sensor alterations w/ my CromePro.

Re: *************In need of wire harness GURU!!!! (pictures included)
 

its easy to make a stock map

Re: *************In need of wire harness GURU!!!! (pictures included)
 

You need the hoses to replace 1, 2, and 6 (the one on the bottom, hard to see the number)
http://www.acuraautomotiveparts.org/...SK70_E1501.gif

Re: *************In need of wire harness GURU!!!! (pictures included)
 

No, it's not a knock sensor. His block is a b18a1...KS's are only found in DOHC vtec's. The 2 prong I'm pretty sure is the radiator fan temp switch. The green plug one I never really found out what it was, it sits in an oil return passage, so it might be some sort of oil temp sensor that won't get hooked up with your z6 harness. I'm using a modified 89 dx->93 z6 harness currently on my b16, and used on my old b18a1 as well with no problems. When in doubt, check the service manual stickies posted at the top of this section...they have layouts of all the sensors and the colors of the wires...just cross reference from there.

Re: *************In need of wire harness GURU!!!! (pictures included)
 

It doesn't need to be plugged in.


All Honduhs have a coolant temperature switch. All water-cooled engine do, as a matter of fact.

You obviously aren't running the OBD1 thermostat housing, which is where that 2p plug goes. You need to extend it to the big two-prong switch on the back of the block which you have the dual red arrows pointed to.



Well, if you block off the FIT-V it isn't required, if you don't block off the FIT-V and leave that coolant line disconnected don't come whining about 1-3K rpm idle surges; we don't want to hear it. BTW, some (non-Honduh) OEM and a LOT of aftermarket TBs are bad about sticking if the TB isn't brought up to operating temperature.


It's an oil pressure switch that hijacks ELD input to the ECU, showing max draw. It's only found on B18A1, and should be ignored.

Re: *************In need of wire harness GURU!!!! (pictures included)
 

What is the FIT-V ?? Does that come off the Coolant exit on the top corner of the block? On my block, there is a short 2" hose w/ a plug in it.... There is also another short hose plugged upthat comes off the rear coolant hard line.

I'm confused by your response.... Blocking off the FIT-V (w/e that is) is not required on the b18a1.
If i do NOT block off the FIT-V and leave that coolant line disconnected, i will get 1-3k rpm idle surges?
So what do i do... ???
Oh, and i don't get why Throttle Bodies would "stick" ??? You mean the butterfly valve inside gets stuck closed or open?

Re: *************In need of wire harness GURU!!!! (pictures included)
 

Fast Idle Thermo-Valve aka FIT-V is a coolant temperature controlled valve. When it is cold - which it will always be with coolant hoses disconnected - it bypasses enough air around the TB to create a high cold idle which all Honduhs of the era have.

If the FIT-V never sees hot coolant to cause the valve to shut, once the engine reaches operating temperature the ECU is going to impose a 1300 rpm "idle revlimit" whenever the throttle is closed. The FIT-V is passing enough air to do 3000 rpms, the ECU keeps cutting off fuel pat 1300, your idle sucks and people next to you in traffic look at you like you are a retard revving your engine at them like that. If you have loud exhaust or open downpipe turbo setup you might get a rope and hang yourself from depression before you get the tech support you need to fix the problem from an online forum.

Either unbolt the three 10mm headed bolts that retain the FIT-V to the IM and insert a piece of thin cardboard slathered with RTV silicone sealant, or run the coolant lines they way you are supposed to.

Re: *************In need of wire harness GURU!!!! (pictures included)
 

i have never gotten the shitty idle from just unhooking it, but i did finally remove it completely and made a block off plate cause i didnt like looking at it

Re: *************In need of wire harness GURU!!!! (pictures included)
 

It doesn't ever warm up if you unhook it, so that one might have been blocked off already.

Re: *************In need of wire harness GURU!!!! (pictures included)
 

i tore the whole thing apart a while after just unhooking it to make the block off plate and it was all open like it should be. only thing i can think of is that the valve wasnt working properly

Re: *************In need of wire harness GURU!!!! (pictures included)
 

It also connects to the TB, the gasket might be blocking it.

Re: *************In need of wire harness GURU!!!! (pictures included)
 

You guys have helped ALOT! thanks so much. I think i am just going to put the coolant lines on it and save some more headaches down the road 8)