Okay the LTFT High stayed at 0 the whole time this time.

Here is the log

Zip: http://phatlogic.com/Evo/Bandit09%20...20-%20Log3.zip

Excel CSV: http://phatlogic.com/Evo/EvoScanData...6_23.55.34.csv

 

good ok... no that we know thats working we need to go back to your problem.

if your think your tune is lean under WOT then add some fuel back in.

the tune/afr should remain pretty stable now thou...

 

Well it's really kinda all over the place....look at the first set of logs I posted, I have like 4 or 5 WOT points on there and look at the map tracer, it logged AFR's all over the place....but it averaged out to still be pretty lean. So it's lean under WOT after a few days and its way too rich under like 65-90% throttle. Richer than WOT. So I don't understand. If I reset the ECU AFR's will be right where they should be under wot but then a day or two maybe a bit longer will go by and it'll get lean again under wot.

Even after the ECU reset, it's still too rich under part throttle and like say I'm cruising, slow down, it lean cuts, then I stop and the engine starts to idle, the idle will be really rich and I'll look at the STFT's and they'll be at 0 for awhile and it takes like 5-15 seconds for them to kick in, and the idle will slowly creep back up to where it should be @ 14.7

I really don't know why my car in particular is having all these weird problems. It's just really frustrating. The only thing I could think of is maybe the fuel pressure is varying a lot but I doubt it....

 

has this always been a problem or only just started?

what you need todo is start by doing repeatable pulls

i would think the intake is throwing the MAF of a little, but your trims seem pretty much dialed in.

in which case you just need to tune the fuel map proper...

go ahead and add (ie subtract from the map) 1 full pt to 180load+ in the fuel map (3000-7500rpm)

then start at 2000rpm or 2500rpm and on a flat/straight road...

are you doing 3rd or 4th?

 

The problem has been happening for awhile, though once I got the trims in check it seemed to get better, but not all the way better.

I usually go wot in second, there's not many places around here where I can do third or fourth, it's almost like every other car is a cop

 

ok well 2nd isnt going to give you a nice repeatable result.

minimum would be 3rd.

ok well we have to assume that everything is ok (mechanically) ie, no exhaust leaks, wideband ok, no boost/vacuum leaks, maf ok, etc

in that case just tune like normal, so :
1) get the trims right for idle and cruise - TICK
2) tune the fuel map - start by adding a full point of fuel to the map (ie subtract from the actual map) then slowly work your way to 11.4:1 under WOT

 

Well I already did both of those and what I am trying to figure out now is how to STOP it from changing so much. I'll have it tuned 11.5 under WOT just fine then a couple days later it'll go lean. The only way I have found so far to fix it is to reset the ECU. So maybe this time after adding the LTFT wot code, it won't go lean after a few days and it'll stay consistent. Only time will tell.

It just seems like to me Evoscan logs AFR points and they're all over the place. Like it'll be 10.8 and then the cell right next to it, 12.8 and vice versa, and sometimes on the same cell 10.8 and then 12.5 on a back to back WOT pull. Another thing I can't figure out is why part throttle is richer than WOT. doesn't make sense to me. I would think my map is setup to have WOT the richest conditions a car should see.

Maybe my car's just a factory freak and something is really wrong with it At least that's what I am starting to believe...

 

it shouldn't be going lean, the tune should be consistent...

give me two logs - showing me this

remember to log as LITTLE as possible, otherwise you just wont get the resolution.

what wideband do you have? where is it installed?

 

Okay for instance, open maptracer and look in the first log I posted, at 220 Load, 5000 RPM. Also look two cells beneath it. And also look at 200 load and 6000-6500 load. It's so inconsistent. Two different log points and air/fuel's aren't really close to each other at all.

I have the AEM UEGO wideband. It's installed on top of my Perrin downpipe right before the HFC.

 

well to be honest your first log is almost useless because your logging WAY to much.

you only need:

tps (to be able to mark WOT runs easily)
timingadv
knocksum
ipw
load (just 1, i prefer to log raw)
boost
activewgdc (only need active since you have a 3port?)
rpm
AFR (from your wideband)

also I don't use maptracer, i find it easier to visualise in excel...

sorry to keep making you do logs - but this is tuning

 

it's cool man....I will do whatever it takes to get the car running correctly. I will go log a WOT run right now, then I will unplug the battery for a bit and let the ECU reset, then I will do it again and show you the difference. Once I let the ECU reset, the AFR values should be right where they should be.

 

yes the AFR should be the same.

as long as you do the same road (same direction) and start at the same RPM...

 

Okay, just went out and did some WOT pulls. I did two logs, one before the ECU reset, and one after. Both doing the same road(s), same direction. Air/Fuel's weren't that bad so maybe the LTFT wot trick did help a lot. I guess I'll know for sure in a few days. Check em out and tell me what you think.

One thing that's still bugging me is why 65-90% part-throttle is richer than WOT. Very baffling to me :-\

http://phatlogic.com/Evo/Bandit09-EvoM-Logs4.zip

Oh yeah, one thing I forgot to ask. Now that the LTFT's no longer affect my WOT fueling...let's say I get a bad tank of gas or winter time rolls around, or I travel to a place high above sea level, or where the climate is dramatically different. Will the car try and compensate for any of those factors (bad gas, climate, temperature, etc) or will the air/fuel's be completely off?

 

ok now that you know the fuel trims are good you can stop logging them (or do what I do and only log the "current fuel trim" which is probably what that wrong address was b4)

also you dont need maf or mafhz anymore...

why are you starting at 4500ish? try and start at 2000 or 2500, i usually overshoot 2000rpm then let the car roll back down to 2000, then WOT it! also try and do 2x3rd pulls.. since boost really doesn't come on that early in 2nd gear...

have you changed your MAF scaling at all?

the trims are really a total summary of all those factors, the ECU has the ability to monitor baro and temp and add/reduce fueling appropriately, but the trim is like the catch all.

in saying that, its much preferable to disable the trim at WOT because it can wander so much, even when your up a mountain your AFR should only drift 0.1 or 0.2, which is fine...

 

To answer your question about maf scaling, no I have not changed it at all. It's stock I believe, assuming the scaling on gunzo's map has stock maf scaling. I do have the XML code in though, so in ecuflash I can change it if need be. I will get some better logs soon per your suggestions, but it seems to me that the AFR's are still wandering too much.

In that last log, for instance, at 200 load, 4500 RPM's, it ranges from 10.4-10.7 where it should be 11.7 (thats what is on the map). Drop down one cell to 200 load, but 5000 RPM, and the AFR jumped to 12.0. At 5000 rpm, 220 load, I have logged data points ranging from 10.5 to 11.7 on the same log, back to back WOT's. 4500 RPM at 180 load has log points at 10.4 and 11.3 Just take a look at the last log in the zip I posted last, you'll see what I mean.

So I wonder what could be causing such fluctuations?