the_duce_duce

I have and EK hatch with an H22 using a P13... i am pretty sure this is the right computer but the guy that did the swap put a jumper harness on it. I cant pass my local emmisions so should i try to remove the jumper?

rick_rabies

yeah get the right ecu, does it drive fine though? just rich? chip it

the_duce_duce

yea it drives ok but vtec does not engage on its own and i know the selinoid is good because i tested it. so is the P13 the right one or no? should i remove the jumper?

rick_rabies

remove the jumper and see what happens. try another ecu or chip the one you gots

the_duce_duce

I appreciate it!

rpared01

you swap is fine. the reason the guy put a jumper is because you are running and obd1 p13 and yes that is the right ecu for the obd1 system

if your are in cali, then the motor needs to be the same year as you car if not newer. 96-98 are obd2a, 99-00 are obd2b, since you are say that you have an ej6 hatch back, then you need to convert that motor to obd2a or obd2b. you are going to need the ecu, and ignition and key, because the obd2 preludes have an immobilizer in the ecu. next you are going to need to hook up all the emissions equipment. next you are going to need to get your motor bar'd for your car. all of this will take time and money to setup up correctly. but as long as you are running the obd1 ignition, you will never pass smog legally.

the_duce_duce

Thank you everybody for the useful info... and no i am not in cali anymore i am in Nashville now. What exactly do i need to be searching for in an ECU? How do i know if it is OBD2a or b?

98Luder

iTrader: (3)

hey i dno't think the 97+ prelude ecu is going to work in your car? (h22a4 is the 97+prelude)
it's got a immobilizer thing inside of it for immobilizer cars, i'm not sure if it'll work.
If you are intersted i have one for sale, but not sure if it will work?

98Luder

iTrader: (3)

oh damn, heh you beat me to it for the response

rpared01

it will work if you have the ignition and key to go with that ecu.

if your car is from 96-98 then its an obd2a, if your car is from 99-00 than its obd2b

Jimster480

What kind of emissions do you have there? Do you need to be OBD2 to pass the emissions?

the_duce_duce

Well when i took the car to the test place and they tried to hook up to the ECU the reader said that it could not detect the OBD... so they tried it like 4 times and still the same thing. so then they bypassed that and were gunna do it with the wand reader in the exhaust and the gas cap sensor and it put out like 5 times as much emmisions as it should have. so i failed terribly and i have a month to figure it out before i have to pay a bunch of fines. i just need to know if i need a P13 or not and if not then what do i need to look for. can i just have my ECU chippped like rick said?

the_duce_duce

and i cant even use a home code reader to see if it is throwing and codes...

drew1987

ok i just recently pass emission here in california with a 97 h22a4 in a 97 civic hatch...if your using a 97 in up ecu it wont work like they said it has a immobilizer..so your only option for people like us that have a h22 in there 96 in up civic is to get a very rare 96 prelude ecu which are the only obd2a ecu without a immobilizer then start taking each code that comes up and knock it out one by one...

1clean5thgen

ok im stuck, refering to your answer, i have a jdm h22a motor, tyrin to swap to a stock h22a4 and smog, i live in cali of course, is it possible that the 99 h22a4 automatic is obd1??? because im trying to buy a new motor from private seller that motor has P13 written all over it (IM, DIZZY MOUNT, HEAD), if im not mistaken im sure P13 is obd1 thus not allowing me to pass smog, anyways his car he taken off the TB, EGR, and DIZZY, so i cant determine if its a obd1 or 2, but like i said p13= obd1 and im pretty sure P5M is obd2 of ecu code

correct me if im wrong

the_duce_duce

I am confused now... so the P13 is for the OBD1 but my motor has P13 all over it too. So do i need the P5M? what else do i have to change?

the_duce_duce

and is my car OBD2a or b? does that make a difference with the ecu?

Jimster480

ya P13 is OBD1.

Jimster480

are you using a OBD2 or OBD1 wiring harness?

the_duce_duce

i really dont know. how do i tell? my buddy just gave me another wiring harness to try but i dont know what mine is or what the new one is...

So what your saying is i need a OBD2 harness with a P5M? what is the code for the 96 lude ecu?

Jimster480

Well does the wiring harnesss that you have right now plug directly into a OBD 1 ECU? Or do you have a conversion harness. And what ECU ru running right now?

the_duce_duce

Its a P13 and no it does not plug directly into the computer. it has a jumper that has been all hacked up. i really need to get this figured out asap or i am gunna have to park my car... i have been told that there is an immobilizer on the 97+ lude computers so i cant use one of those but somebody else also said that there is not an immobilizer on those so i dont know who to beleive... i know that this swap has been done before without issue so i dont know what my problem is?

1clean5thgen

well, since i figured out my own question earlier on this link i found out that, honda never changed the the codes on(p13) the head, IM,or the Dizzy mount, so h22a4 obd2 use same head and IM, my answer on ur question is, to determine the difference from harness obd1 and 2 is that, the obd2 harness on their dizzy connector has 4 and obd1 have 8 wires. and ur ecu code should be P5P, im 100% positive

1clean5thgen

^^^^^^^ my answer refering to ur ECU question, should be P5P, for 96-99 prelude.