lophatcustoms

Put an D15B vtec in my ek with 06 ecu, Failed emissions twice, running both oxygen sensors that came with the car (4 wire) and I see the EG civics run 2 wire non heated O2's, Wondering if after the car is converted to ODB1 are the 02's no longer heated? I am running the stock EK engine harness.
Wondering cuz EG o2 sensor 50 bucks, EK o2 sensor 240 bucks....
thanks

chris_v2

Zeeman will know better than I will, but I believe the p06 (z6) map's are different than the actual jdm 1.5L maps. These are different engines, although similar, I believe custom tuning is needed to make it run efficiently.

lophatcustoms

its a po8 ecu , my mistake

lophatcustoms

this forum is disheartening , every post seemed to be answered with Zeeman can fix it

respectitorsuckit

well he can

zeeman

iTrader: (1)

The p08 ecu is the proper ecu for that engine. From my understanding the p08 uses a non-heated o2 sensor, most EG's use only 1 primary 4-wire o2 sensor which is heated, the VX model comes with a 5-wire factory wideband o2 sensor.

If you have a chipped ecu you can disable the o2 sensor and not have to run any o2's BUT i don't typically recommend doing this unless you've had the car tuned. This is b/c when disabling the o2 (running open loop) the car will rely strictly on the maps stored on the ecu (among other things) to calculate how much fuel to deliver it will ignore the feedback from the o2 sensor all together.

When using a stock ecu it will use the feedback from the o2 sensor(s) and quickly adjust the fuel to get a sweeping 14.2-15:1 Air/fuel ratio. The ecu will also take notice of these "short term" adjustments and make long-term adjustments to the fuel trims. This is whats best for passing an etest when using an OEM cat

ol Dusty

iTrader: (2)

ah crap, that explains a little of why my car seems a little funny after my z6 blew I just tossed in a d15b I had layin around. I wondered about the ECU. now I really need to get my motor out, built, turbo'd and tuned. Sorry Zee, really wanted to go to you for the tune but 2 days after I blew the z6 I drove the car out to my new place in BC. kinda far to get a tune done. worst part, I have a stock p28 in the car and a chipped p06 that was running a typie with I/H/E for the build and now I prolly need to get a p08 till I can get the motor build done. Prolly wont though, now that I'm out here I'm prolly gonna find a 1st gen CRX and drive that till the turbo build is done. then maybe start something with the rex.

sorry to thread jack, but I think Zee has covered it already anyway.

D.T.P

OP you are worried about your o2 sensors, if they are not throwing cel then they should be still fine. What cat do you have? what were the readings of the etest? that could help us help you

MPR

^Back when I had my etest done and it failed, we hooked up a scan tool and the primary O2 was slow. Not slow enough to throw a CEL though.

Just something to note.