Hondata

hello fellow hondata tuners im having a wierd issue with my 3 year project. im trying to make it to last race of the year at my local track the 29th. i got it started yest and i have no cel etc. when i first start it it starts perfect and idles and runs smooth for around 1 min then "like on a timer" it starts idleing rough and afrs go from 10s to 14s. i can turn the engine off at anytime and start it up and it does it all over again. i have tried everything to figure it out to no evail. fuel press stays steady at 37 all the time. i changed plugs. please look at my attached map and see if anythings wrong?? ive tuned around 60 cars and never had this issue. i will post a log tomm of it. the log looks normal to me. here is my setup.

s300 installed into a us p28
91 integra
fully built 9:1 gsr
1000cc precision turbo peak and holds
aem 3.5 bar
stock distributor
60-1 garret front mount
walbro 255 hvhp
bcpr7es-11 ngk plugs gaped at 28

i would appreciate any help guys.

heres a couple startup logs i did today. the afrs show rich for first 17 seconds till wideband warms up. then arounds 35 seconds is when the car start running like shit. i changed distributors,hondatas,plugs,wires and nothing helped...please help guys

well im not sure why this thing is acting this way on a timer it seems but why are your cylinder trims set all over the place, and your fueling at idle is also all over as well as having a pretty big variance in timing on the map for idle so that will cause some instability try smoothing those setions out and see if that helps at all.

are you running an iacv if so why is the error disabled

also try adjusting your tps so that its minimum value is closer to 0

i tried the cylinder comp all at 0 and im not running a iacv im running a victor 70mm tbi. you can see how it stays smooth then around 35 sec the inj duty and timing just start going irradic. ive tried different maps changing fuel timing etc. nothing helps

surfingsk8r wrote:also try adjusting your tps so that its minimum value is closer to 0

im going to try this today

yes admitedly your datalog is very wierd i thought at first i was going to see something in your may that was a correction factor that got triggered as certain conditions arised and that may still be but i cant seem to find anything looking over your calibration but ill keep looking

well you can try this i made some smooting changes to the lower section of your map and changed some of the perameters. might work might not but its worth a shot.

surfingsk8r wrote:well you can try this i made some smooting changes to the lower section of your map and changed some of the perameters. might work might not but its worth a shot.

hey i owe u a popsicle for trying to help me. i had a aem 3.5 bar map sensor brand new on the car. i installed a hondata 4 bar i had sitting at my shop and it idles like a kitten now. it was the aem map sensor making it flip out!! go figure.

heres a log of the best i could get it to idle after i put in the 4bar hondata.

Well im glad to hear you got it figured out man now go enjoy driving the car.

well i finnally got it going today. did a quick street tune heres a log with afrs i think im rich coming into boost and a tad rich before redline, but it pulls hella good. i had some issue with it breaking up above 6500 so i re gaped plugs from 28 to 20 and fixed that.

man with millions of hondatas out there this forum sure is dead.