RomRaider

I've been trying to get my MAF scaling perfect to prepare for installing my ID1000.
What's been troubling me is after a drive to work in the morning, high 60's low 70's and pulling a learning view I see 0-5.6 and 5.6-10 ranges at +/- 6% or more. After a drive home in the afternoon and higher temps, mid 80's my corrections are ALL within 3%. I am convinced this is due to an IAT compensation problem but I'm not sure how to approach dialing this in.

being able to see the rom would help, and a log if you have one.

This is a log from a typical drive home today. Left work learning view was up to the 6's in the first to columns now back to the 3's after an afternoon drive home.

you've got one table for IAT compensation of the MAF, and if you look at it based off of where you run during closed loop, it doesn't have much of an effect on things.

I was under the impression that table A and table B for timing were still undefined as per when the ecu uses them on these ecus. I see your timing is different between them, and I know that most people keep both tables the same.

what are you using to log data? is time in seconds? is your wideband located in the midpipe about where the rear 02 sensor would have been?

to me, it just looks like you should get the MAF scaled well, and adjust tip-in enrichment.

seeing a change from early in the day to later in the day on learned long term fuel trims isn't a big deal if the change isn't too big.

say you spend a lot of time around 3 g/s (1.17v) during warm (engine is at operating temps) idle earlier in the day (colder outside temps) and idle around 2.7 g/s in the afternoon (1.13v). if 1.13v was 3% more than it should be, and 1.17v was 6% more than it should be, you'd see a LTFT A of -6% in the day and -3% at night. They're both under 5.6 g/s, which is where LTFT A resides, but you spend time learning the fueling error for two different cells.

to add, why is your cl/ol status always 6? is there something different about the older JDM ecus? I don't know what 6 implies, as I'm used to 7, 8, and 10.

Logging with tactrix standalone right now, my laptop battery took a crap and wont last more than 15 minutes.
Recently started adding timing, overlooked table b, thanks for pointing that out.

Not too sure on the cl/ol being 6, ive seen 7 and 8, maybe my scaling isnt right on the logcfg file?

I havent adjusted tip in yet. If im about to switch injectors is it worth the effort now just to do it again?

Thats makes sense now that i think of it. I have a 3% "window" just need to move that window closer to zero.

do it now, you won't need to touch it later except to change the base pulse width table a factor of scalar difference, that's all.

Thanks for the pointers, got anytips on adjusting tip in?

one compensation for tip-in enrichment is based off boost error. getting target boost table within 2 PSI margin of error will help a little bit, but the biggest changes are going to be to applied counter threshold and counter reset.

drop applied counter threshold and increase counter reset.

Great Feedback from Jon. Question on the rom you linked. This is something your running now with no issues? do you actually have AVCS hooked up?

One of the things ive found hard to tune the maf is when your using a "lot" of avcs or when there are changes in it like cruise vs WOT. In your maps you run 33 degrees AVCS roll down to 28 then back up to 34 potentially. that ramping will cause your MAF scaling tool to be all over the place in romraider. especially if your fluctuating Timing as well.

Things i do are on the MAF IAT comp table, take the middle three rows and 0 them out. That will help a little.

For MAF specific tuning... I typically do it in three phases.

1) get it to cold start at 12.5 AFR. not sure why i target that but i play with the injector size till it starts at 12.5 seems to be a good start for me (I start it, look at wideband, shut it off, adjust, restart)
2) warm it up and then turn on RR MAF adjuster. I log sitting still i slowly ramp the rpm up till you get to the max the maf will read at stop... typically i get the idle range at that point. I can see if the BOV is opening and such and fix.
3) Cruise i do cruise up to 2.9V which is typically where Open loop is anyways...
4) I adjust the rest based on full boost when i hit it (volts) to the top and multiply it by 5% or whatever then interpolate to the 2.8 volts.

Rinse repeat. its not that hard. But you need to make sure you have smooth transitions throughout timing, IAT comps and i believe sometimes i have to make tipin changes but rarely if i do it this way. Let us know if you would like help and also the answers to above.

Good luck!