Hondata

my friend and I build and tune our cars by our self, we may not be the big names on H-T if you know what I mean, but we are certified army mechanics with many years of experience, plus our experience with hondas. with that said and done.
my car 2.0l GE sleeved ls vtec motor built by me, tuned by my friend on s300 with my driving and moral support, I can tune but it is difficult while driving, fact is we are both wel experienced in tuning, and working on cars.
we will tune the car all day , get everything perfect and be happy, turned the car off, let it cool down, and then restart and the whole tune will change idleing lean, and boosting rich as hell, do it over again and same thing. reload the tune, and it does change anything .
yes we upload and save.

I just want an opinion or fact on what may be the problem why the tune keep changing?

car 1995 civic ex
motor b18ablock/b16 head... LS/VTEC
84MM Golden eagle sleeved, wiseco 8.8.1 pistons
crower turbo cams. sc61 turbo, aem 3.5 map sensor

rc 750cc ,walbro 255lph p28 s300. will post the tune later, don't have a datalog of the tune though.

YOu'll need to provide a datalog showing the problem.

datalog and tune
I having problem attaching the datalog its saying its not allowed

It has something to do with ect/iat temp compensating . I too have this same bug . If i let the car run for a minute or two then it returns to normal . It only really bothers me on the dyno when tuning .

Closed loop - o2 sensor heater is disabled. If you're running in closed loop, do not disable the heater. If running in open loop without an o2 sensor, then you can disable the heater.

If the datalog won't attach make sure the extension is .s3d. Otherwise .zip should work.

yes my o2 heater is disabled, I will try again. but if I enabled the o2 heater wouldn't this activate a MIL/CEL? I am running a wideband sensor. witha analog output connected to d14

Is the the wideband narrowband output connected to the primary o2 sensor input? In that case the o2 heater would need to be disabled.

Hondata wrote:Is the the wideband narrowband output connected to the primary o2 sensor input? In that case the o2 heater would need to be disabled.

it has a analog output that is connected to d14, its only there to aid the wideband for the narrowband switching point.

What do you mean by narrow band switching point?

Spunkster wrote:What do you mean by narrow band switching point?

my widebabd has that option, but I don't use it. I just stay close loop.
I think the problem was with the smanger I was using, I download a new version, and upload a old tune from last year, and it stays the same and don't change, I havent got a chance to retune, but it running better.