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I'm putting a B18C6 into an EG3.
OBD2A B18 engine loom.
OBD1 EG6 interior loom (EU LHD).
Most connectors match up as expected but I am left with a few that I cannot identify.
Sorry if this is the wrong section. Whole build being held up by these connectors and my mechanic and the person who sold me the interior loom are both at each others neck saying the other is wrong.
What country are you in? Are you sure the first pic is the interior side? It looks like the plugs for EGR and wideband O2 sensor on a VX (vtec-e) Civic, but on a VX they're on the engine harness not the interior/cabin harness. However if it's a RHD car that may be different.
Leave your original interior wiring alone, buying another was money wasted unless yours was trashed. Buy an obd1 vtec engine harness, obd1 injectors, obd2a to obd1 distributor harness jumper and either an obd1 alternator or figure out whether you can depin the obd1 plug and change it to the obd2 plug.
Then you'll still need to figure out what to do for engine management.
What country are you in? Are you sure the first pic is the interior side? It looks like the plugs for EGR and wideband O2 sensor on a VX (vtec-e) Civic, but on a VX they're on the engine harness not the interior/cabin harness. However if it's a RHD car that may be different.
Italy and the interior loom is from an italian EG6
Originally Posted by Chrisfrom1986
Leave your original interior wiring alone, buying another was money wasted unless yours was trashed. Buy an obd1 vtec engine harness, obd1 injectors, obd2a to obd1 distributor harness jumper and either an obd1 alternator or figure out whether you can depin the obd1 plug and change it to the obd2 plug.
Then you'll still need to figure out what to do for engine management.
Original interior loom was for the dx engine (carb non vtec), the EG6 one is already installed now but for some reason it doesn't match up to anything I've found or anything we've encountered with previous similar swaps in terms of the connectors between it and the engine loom
Italy and the interior loom is from an italian EG6
Original interior loom was for the dx engine (carb non vtec), the EG6 one is already installed now but for some reason it doesn't match up to anything I've found or anything we've encountered with previous similar swaps in terms of the connectors between it and the engine loom
Originally Posted by 94EG8
The engine harness looks right. I think your issue with the cabin harness.
Corrected below.
Last edited by Chrisfrom1986; 10-31-2018 at 02:34 PM.
You cannot use an obd2 engine harness in a obd1 chassis, you MUST use an obd1 engine harness. It does not matter if it is non vtec as there are only 3 wires to add to make vtec function, do your research.
You very definitely can use an OBD2 Integra harness in an OBD1 Civic. Direct plug in at the shock tower plugs. Simply use an OBD1 ECU. This is the easiest way to drop an OBD2 B-series engine into a '92 - '95 Civic
Originally Posted by Chrisfrom1986
You do not replace the cabin harness unless it has been damaged and only with another obd1 harness. Read my previous reply again.
You do when you're in Europe and dealing with a car that was originally carbureted.
So are you also replacing the entire harness from the fuse box to the rear of the car as well as the fuse box? Because that's the only way I see that happening. Then you end up having to replace the dash and hvac harness, tell me how that all works out? I understand EU chassis have different wiring but I've replaced all wiring in several vehicles and I can't imagine why you would convert an obd1 chassis to obd2.
He's not converting the chassis to OBD2. He's running an OBD1 cabin harness with an OBD2 engine harness. The only real differences between an OBD1 and OBD2 Integra engine harness are as follows:
Distributor plug
Injector plugs
Alternator plug
Addition of CKF wiring (this goes to the 2 pins on the passenger's side shock tower connector that would normally be used for Vtec wiring on a LHD vehicle)
Items 1 - 3 in that list function exactly the same as their OBD1 counterparts, literally the only difference is the connector style. Item 4, the CKF sensor wiring is unimportant since an OBD1 ECU won't look for the CKF sensor anyway. The main benefit of running an OBD2 Integra engine harness in a '92 - '95 Civic or '94 - '95 Integra is that it allows you to keep all of the newer OBD2 components without having to splice connectors or run conversion harnesses. it's especially nice as it also eliminates having to lengthen things like IAT and O2 sensor wiring for a B-series swap as well.
Ok I didn't know the shock tower plugs were the same between obd1 and obd2 integra because I've never owned an obd2 integra, 94-95 integra does not use any obd2 connectors in the engine harness though as its obviously obd1.
Why would you need to mess with any interior loom if you're just doing a B-series swap?
That's what I was thinking but he has an EU carb chassis which may not have the wiring for a pgmfi ecu.
Still makes me wonder if he's going to need to change the fuse box under the dash and anything else. How about fuel lines, fuel tank, fuel pump wiring? Did you use the entire interior harness?
Last edited by Chrisfrom1986; 10-31-2018 at 04:50 PM.
That's what I was thinking but he has an EU carb chassis which may not have the wiring for a pgmfi ecu.
I'm really not sure what they have on the carbed setups.
Originally Posted by Chrisfrom1986
Still makes me wonder if he's going to need to change the fuse box under the dash and anything else. How about fuel lines, fuel tank, fuel pump wiring? Did you use the entire interior harness?
You probably could run an inline fuel pump and replace rubber lines for ones rated for fuel injection, but generally speaking you would replace the tank and lines with ones off a fuel injected car. You could just run the wires to the fuel pump for power and ground since the wiring for the sending unit for the fuel gauge should still be there. Fuse panel and ICU would probably need to be changed. I don't live in Europe so I don't have a European base model Civic to look at, but the rear harness should be the same as it's just for lights, cabin harness going back the driver's side you can probably keep but add two wires for the fuel pump. Everything forward of that definitely needs to be replaced.
I'm really not sure what they have on the carbed setups.
You probably could run an inline fuel pump and replace rubber lines for ones rated for fuel injection, but generally speaking you would replace the tank and lines with ones off a fuel injected car. You could just run the wires to the fuel pump for power and ground since the wiring for the sending unit for the fuel gauge should still be there. Fuse panel and ICU would probably need to be changed. I don't live in Europe so I don't have a European base model Civic to look at, but the rear harness should be the same as it's just for lights, cabin harness going back the driver's side you can probably keep but add two wires for the fuel pump. Everything forward of that definitely needs to be replaced.
I know what's necessary, I want to know exactly what OP did or if he's planned for it.
I know what's necessary, I want to know exactly what OP did or if he's planned for it.
Whole interior loom back to fuel tank, taillights and all is all from EG6 and vti tank/pump
Still haven't been able to identify the connectors on cabin loom side so at this point I'm assuming I was sold some weird variant or maybe not even actually EG6 loom so will find another one..
It would be helpful to know what side of the harness and which plugs are nearby. The interior firewall loom terminates at the shock tower with 3-4 plugs depending on model. The 3 wire plug does not terminate at the shock tower plugs on a normal chassis.
Sounds like you still need to replace the fuel and return lines as well.
10-19-2018, 04:44 AM
Help identifying loom connectors
