lolv8s

Okay so I've been building this b18a1 for a while now and I'm getting pretty close to the end of my build. Anyways. This motor came out of a 90 DA and im trying to swap it into my dc4 shell. I've done quite a bit of searching on Google and HT trying to get the information that I need. The best thread I can find is this one. https://honda-tech.com/forums/honda-civic-del-sol-1992-2000-1/faq-obd2-into-obd1-into-obd0-into-vice-versa-wiring-only-1842858/
But now when it starts talking about the VTEC I get a little confused. See I don't have VTEC. I chose to keep the original b18a1 head and had it port and polished with a 3 angle valve job and put in a fully built valve train.(Brian Crower) now I know I need a hyrdo tranny because its a dc4. But what else do I need besides that. I don't have an engine harness so I know I still need that. A parts list would be perfect. Any help is appreciated.

lolv8s

Somebodys gotta know something.... cmon

HondaPartsHero

Does it have any harness at all for the cabin? What ECU are you running?

lolv8s

Yeah it has the ecu harness and all that under the dash it just doesn't have an engine harness. I've read I should run a pr3 but I don't have vtec.... I still haven't bought an ecu yet.

HondaPartsHero

If emissions isn't an issue you really want to do an OBD1 P75. You can chip this later and get it tuned plus it'll eliminate all the OBD2 items your engine doesn't have. For the harness any 94-01 Integra will plug and play with your shock tower and most everything will plug and play. You'll have to manually run the wiring for your cooling fan from the thermostat housing connector to the back of the block connector and pick up a 4 wire O2.

lolv8s

So I'll need a p75. Obd2 engine harness. And an obd1-obd2 ecu conversion harness?

lolv8s

Bringing this thread back because I wanna make sure everything gets done right and I don't waist money. Any input from anyone is appreciated.

HondaPartsHero

Yes

-reuse the 96 LS distributor, alternator and injectors for plug and play
-rewire fan switch to the back of the block
-you'll need an OBD1 or 2 throttle body with the MAP sensor on top

lolv8s

okay got the obd2 harness obd2 distributer obd2 alternator... But I have a lot of plugs dangling that don't have anything to plug into. Where do I go from here?

F1_Racer

Just swap over your OBD 2 components onto your b18a motor and run your original ECU. No need to do all that wiring and crap switching over to OBD 0.

lolv8s

I don't have the parts from the obd2 motor I bought the car as a shell. And I have an obd2 transmission so I dont have to worry about the plugs on the tranny its just mainly the back if the block. I've got plugs that's don't match. And I've got plugs that don't go anywhere. Here's a pic of one of the sensors I don't have anything that matches. Its the two pronged one. The green one plugs right up.

mithious

The two pronged sensor is the OBD0 placement of the fan switch sensor. The OBD2 ones have that sensor on the thermostat (usually brown I think? it's a similar size to the green one you've got in the photo there) I have no experience with the B18A1, but I believe it is the same.

So you take the wires that would go to that two pronged sensor and extend them, connect them to the plug that goes to the thermostat housing.

That's what HondaPartsHero was talking about above when he said "You'll have to manually run the wiring for your cooling fan from the thermostat housing connector to the back of the block connector"

***

Edit: I may have it backwards here. If you're using the plug in the back of the block, the wires that would go to the thermostat fan switch will be extended and connected to the one at the back of the block. Either works - just depends on what you've got to work with. All those sensors do is act as a temperature switch, so when the coolant is hot enough the fan kicks on.

Hope that wasn't too confusing. Multitasking a bit too much at the moment