Hondata

When properly tuned LTFT should be as close to 0 as possible. Both issues sound like it just needs additional tuning. The fuel tables and compenstaions are more than likely what need to be adjusted.

thanks! so i have to reduce the low RPM fuel tables? since i don't want to affect the WOT tune ...

log

so i have DC2 B20VTEC with CP 12.5:1 pistons etc, Portflow worked head, Skunk2 pro2+ cams etc, endyn hand ported in. manifold, 65mm TB, bisimoto 'ramhorn' ex. mani, 2.5in exhaust...

fuel is set to 80 psi with aeromotive 13109 FPR, ID725cc injectors, S300 in new ECU. car is dyno tuned and made ...

You should never need to remove 10% fuel from a single cylinder. This sounds like you have some mechanical problem with the engine. I would suggest a leakdown test to help determine where the problem is.

hi - thanks, that is kinda obvious! comp test is 250 psi on all 4 cyl, but yet to do a ...

does it go all across load points? i am at -10% on cylidner 2 and it is all good under WOT - but still the no.2 s.plug gets black during closed loop...

yep - all good!

snipped the resistors and got the WB running perfect into closed loop thanks to your help :-)

OK, so on OBD2a ecu the ELD is on D16

but in SManager 'Closed Lopp Parameters' there are only options for OBD1 pinouts...

do i just select D10 ELD anyways?

( i assume so as i had the wideband going into D7 and had selected D14 in the drop down box and it was working before...)

AREA876 wrote:Take a look at settings in close loop parameter.This is set for B6 wideband input. You can Try these setting in close loop. Please note information on analog inputs in settings.

nice work - thanks!

You can use D10, D12, or B6, read the help files to get a better understanding.

cant use D10 as it is not wired up on my ECU.

EDIT: actually using OBD2a so it is D16 - DOH!

so B6 is full range 0-5V?

Try grounding the LC1 to the thermostat housing, that's where the ECU is grounded ( in most ...

LC-1 with DB gauge

i have set the LC-1's A1 (yellow) to output 0-5V and that is attached to D14 on the ECU.

but it sounds like D14 is limited in range, so need to either change the output for the LC-1 or change the input to the ECU...

for logging purposes i want to use the full 0-5v range, so ...

long story short: i cant get it back to operating in closed loop properly - that is, at 14.7:1

but looking at this log - is it in closed loop?

Ur wideband target voltage is set at 2.36 volt while your voltage/lambda conversion table is set at 2.31v for AFR of 14.7.

Therefore in close loop ...

OK, so ELD D14 is not available as it is not wired up on my Hondata modified ECU.

is B6 0-5V full range input?

here is the cali

it is b20vtec 12.5:1 with toda C's

long story short: i cant get it back to operating in closed loop properly - that is, at 14.7:1

but looking at this log - is it in closed loop?

Spunkster wrote:D14 does not have the full range of voltage needed for a 0-5 volt input.

18 gauge wire is sufficient at the thermostat housing.

cool, thanks for confirming. :)