RomRaider

Hey guys im just woundering if somebody could look over my logs and let me know what they see is wrong. my idle is not steady. and afr is up and down also. and if anything else please let me know.
have quiet allot of mods fuel pressure reg aeroflow rails parallel t3/t4 rotated setup. 3inch exhaust no cat. forged pistons ej20G block with 208 heads. 1000cc injectors and a dw200 fuel pump they not installed tho. using 98ron here to btw. want car not with ruff idle first. heres a log anyway.any feedback would be greatly appreciated.

your AF correction is rolling about all over the place at idle - you need to also log AF sensor #1 (front o2) to see how that compares to your wideband. With an AFR ranging from 10.3 to 14.8 at idle its no wonder its rough. Have a look round the engine bay for vac/boost leaks then see what your MAF scaling is at. Hard to guess much else without seeing the rom and how your engine bay is laid out.

start with the basics, leak check, maf scaling/injector tuning and see where that leads you.

thankyou for replying bro. ive smoke tested a couple times and have come back nothing. i started to think break booster but it would have showed from the smoke test wouldnt it? its done my head in ay. been like this for 6 months the hunting idle. ill try attatch the tune for you to have a look at. ill also log the af sensor 1 along with some others. injectors are just pink 565s ive allways had in it. anyway let me know once you get time to have look at the tune. maf scaling looks a bit eeffy aswell i think.

it wasnt uploading the rom file for some reason.. am i not allowed to upload it to here?

if you didnt make the tune you can't upload it (forum rules), but also it needs to be zipped up.

yes i made the tune but it wasnt from scratch. copy and pasting maps and then messing around with them a bit. i accully tried scaling the maf using the function in romraider a while back because of this issue however didnt make a difference with the idle.

your A/F learning value is basically stuck at -15 and you're dropping in and out of closed loop. check for leaks first of all then do a little bit of maf scaling to suit whatever intake is installed on the car.

hey thanks BLUDGOD. much appreciated. ill see what i can find. whats the best method for checking leaks you say?
and yup ill do some maf scaling. closed loop and open?

is it better to use the spread sheet from badnoodle or the romraider scaling tool?

best way i've found is smoke testing machine and a pressure testing machine - with the pressure test run it up to like 1bar and if anything is messing about on boost you should be able to spot it.

For MAF scaling, that's MAF scaling not CL or OL only you do the whole maf scale. Not really used those sheets much for it so couldn't say which is better but try both and see which gives you better results.