killimajaro

to save time wiring again, what harness do you recommend for a 99 civic lx d16y7 obd2b for a b18c1 swap? the c1 is obd 2

HondaPartsHero

99-00 Si would make it basically plug and play minus a few things (IABs, IAT, wire in secondary 02). What ecu do you plan on using?

killimajaro

idk i need it to work on the 4 door so what do you reccomend?, the same ecu from the 99-00 si or an 96-00 integra GSR ECU?

HondaPartsHero

96-99 P72, OBD2B - OBD2A jumper harness

killimajaro

btw i forgot to include the fact that the tranny is automagic so will the 96-99 P72 work? or do i have to find an ecu for an auto GSR

NotARaCist

iTrader: (1)

You aren't going to get an automatic transmission in that car without a LOT of custom work.

killimajaro

the d16y7 in my civic is an auto, if its a simple bolt in swap (minus a few wiring and adapters) why wouldnt it work?

HondaPartsHero

Not bolt in and no one that I know of makes mounts.

NotARaCist

iTrader: (1)

It definitely is not a simple bolt-in swap. The B series automatic transmissions are noticeably larger than their standard counterparts, and installing them involves making custom mounts, as well as modifying the frame of the car. If you insist on doing it, you would be best served using the harness and ECU from the car the motor and transmission came out of.

By "best served", what I really mean is "you don't have another option".

HondaPartsHero

I also believe the SIRG uses a separate TCU as well.

killimajaro

Ok, so what do you guys recommend for a tranny? The same d16 (last resort) or some where along the the lines

NotARaCist

iTrader: (1)

A B series manual transmission. Any B series manual. LS will have the tallest gearing (thus, slowest acceleration), GSR is shorter, and SI is shortest, and CTR/ITR is the same with an LSD.

Bullet15

I have a 1997 civic dx hatch with a 1997 jdm itr b18c in it. I want to pass emissions here in georgia so I've swapped to a US intake with purge solenoid, US b18c5 with crank sensor and swapped vtec solenoid a to a US one that has the sensor on it. I've also changed the wiring harness to a 1997 ex harness. The top and bottom ends a freshly rebuilt and now my local shop that is installing the engine is stumped to wire it. What wring changes need to be made with this setup to connect all needed sensors and which ecu should I run to pass emissions. I own the stock jdm ecu that went with the engine, an ecu from a 1996 gsr and a p28 that is "chipped" supposedly . Any help would be greatly appreciated

ferio-ichi3

It should mention wiring in the 2nd o2 sensor when using a obd2b car with non vtec, and staying obd2b with the motor.

Furlanetto

This is my first post on HondaTech, i've found great information so far.
I have a built GSR in an OBDIIb ek (9:1 comp ratio). I need to pass emissions in Ontario so the stock IM and exhaust is on and all sensors are wired up except for the IAB and Knock Sensor. Now can I use the P75 B18B ecu that doesn't look for the IAB or KS for emissions, all i need to do is drive a bit to reset monitors so I could care less about lack of vtec.

tony_2018

You can get an obd2a ecu and buy the conversion harness. If the state needs to plug into the obd2 scanner than it will work, if you need to pass visual inspection I'm not sure how you'll pass with a b-series in the bay.

tony_2018

Why not wire it in and get the correct ecu to run it? Or are you trying to use an obd1 chipped ecu and just want to get the car to the emissions station and pass than I think it might just work.

Furlanetto

Any OBDI ecu's will not connect with the scan tool and fail emissions.
I'm just cheap, had no knock sensor and their expensive. Ended up getting one of a D16y8 from the wrekers for $3, and i'll use the original obd2 ecu. I read the IAB won't throw a code unless you hit a high revs where it activates.

lazyllama

first off great write up.
second i have done the swap with my 98 LX and am using the p2p ecu. i have repined everything correctly, and it idles fine around 1500 rpm. when i put it in gear and let out the clutch to move, it stalls on me. would not having a knock sensor do this or is that just for vtec?
any help is greatly appreciated.

tony_2018

I kinda wrote this wrong, I was suppose to state the obd1 part last.

h2bej6

Can you just lay out a 99-00 Civic Si engine wire harness and tell me which plug with what color wires is what? Im swapping a H2B into my 99 Civic LX and using a 99 si harness but I dont know what plug/wires go to what let alone know what plug is what besides the obvious injectors dizzy etc but some plugs all look the same.

HondaPartsHero

Check out this other thread I made for the connector guide, it should help get you pointed in the right direction

https://honda-tech.com/forums/honda-civic-del-sol-1992-2000-1/92-00-honda-acura-engine-wiring-sensor-connector-guide-3146770/#post48795245

tony_2018

I think it's best that you should understand the sensors on your engine by getting the repair manual for the car and for the engine going in the car. Then you'll know what plug goes where.

civicsi3501

i have a question. just recently acquired a 96 civic with a d15b7 swap in it. wasn't running at all when i got it. Finally got it to run, a couple of wires were loose and disconnected. it wont stay running for more than 5 seconds. you have to feather gas to get it to stay on, but even then it wont rev past 2000 rpms... i noticed the ecu in the car is from a 96 civic.
(37820-p2e-315) i also noticed he followed the diagrams for re-pinning and splicing of the wires. (iacv, iat, fuel injectors) Aren't you supposed to use an obd1 ecu?

also getting codes (9) cyp sensor, (14) iacv, (20) electrical load detector , (65) secondary cat
Thanks in advance

HondaPartsHero

Sounds like they just swapped the entire engine in without using the appropriate intake and exhaust manifolds. If your area doesn't use the scanner for emissions you'd be best off getting an OBD1 P07 ECU. It'll at least take care of your IACV (considering the previous owner wired it in correctly) and secondary 02 codes. Also not sure why you have code 9 but that's an issue with your distributor, when you should have a code for CKF due to the B7 not having that sensor.

If you need to run the OBD2 ECU your going to at least need the following, Y7 throttle body if you don't already have it and use that IACV, a secondary 02 plugged in or after your cat, diagnose your code 9 and bypass the CKF. Not sure about the ELD but it could be bad or you have some wiring issues.