Official OpenFlash Tablet FA20 Tuning Tech Discussion Thread

[el-92]

Originally Posted by cuddefred

I'm pretty sure it is much nearer to 105mph in the manual than the figures you mention here

Correct 107 mph is where I feel the dip then about 2 seconds later starts picking up again

[Apoc]

Originally Posted by themajesticone

I don't feel like writing a lot right now but I would suggest reading/searching for past conversations between jamesm and shiv as well as some of the recent 'software tuning' threads that are active right now at the top of the list. Do some research. I have had my OFT for a year now and as time progressed I became more and more disappointed, mostly in the responses read as well as their fail business model

In fairness, you really should elaborate since you are suggesting our engines will fail. I have read most of the tuning threads and come to the conclusion that you can't please everyone. Some peoples expectations of what a tuner or of tuning platform can do are unrealistic based on a dyno graph or without data.

[el-92]

Originally Posted by steve99

If you can log it. would be helpful in diagnosing any issue.

Suggest

rpm
load
flkc
Knock Correction
IAM
AFR
Commanded AFR
Throttle plate
IAT
LTFT
STFT
MAF
speed

Black engine speed .blue maf .green Afr.

[steve99]

Originally Posted by el-92

Black engine speed .blue maf .green Afr.

looks like something caused throttle plate to close Mass Air flow drops considerably. That kind of thing can happen if traction/stability kicks in

do you have a staggered wheel setup ie different diameter wheels/tyres size front/back ?

Probably need injector pulse widths for port/direct to see if its fuel cutting as well.

Your considerably richer than OL Fuel table do you have standard intake ?

or was that first tank of E85 with a fair bit of petrol left in tank.

would be good to see raw data with all parameters

[el-92]

Originally Posted by steve99

looks like something caused throttle plate to close Mass Air flow drops considerably. That kind of thing can happen if traction/stability kicks in

do you have a staggered wheel setup ie different diameter wheels/tyres size front/back ?

Probably need injector pulse widths for port/direct to see if its fuel cutting as well.

Your considerably richer than OL Fuel table do you have standard intake ?

or was that first tank of E85 with a fair bit of petrol left in tank.

would be good to see raw data with all parameters

Nope stock wheels stock tires probably been on e85 for over a month now . so not my first tank . k&n drop in filter perrin inlet hose .and a cat and muffler delete but that shouldn't affect the car like that should it ?

[steve99]

Originally Posted by el-92

Nope stock wheels stock tires probably been on e85 for over a month now . so not my first tank . k&n drop in filter perrin inlet hose .and a cat and muffler delete but that shouldn't affect the car like that should it ?

nope as long as no intake leaks or exhaust gasket leaks near 02 sensors. those will upset either MAF reading or 02 sensor readings. This can cause problems. If that K&N is oiled filter , sometimes oil can get on maf sensor if over oiled and cause issues, probably worth cleaning maf sensor.

It usually seen in logs as high fuel trims and large differences in commanded afr and actual afr.

I cannot remember off hand what the front o2 sensor is scaled to but I think its rich max is about 11.3 afr and your afr is flatlining which makes me think that it may actually be richer than 11.3 as the sensor has hit its limit.

This may be the issue, anyhow shiv is going to look at it I believe.

check out your LTFT if its 10% or more indicates problems like exhaust intake leaks dirty maf sensor ect. and your running at least 11.3 or richer when the OL fuel table is about 12.2 to 12.5 from memory.

That tune was actually intended for cat-less header , so the combination of catted header and other exhaust mods may also be contributing.

[el-92]

Originally Posted by steve99

nope as long as no intake leaks or exhaust gasket leaks near 02 sensors. those will upset either MAF reading or 02 sensor readings. This can cause problems. If that K&N is oiled filter , sometimes oil can get on maf sensor if over oiled and cause issues, probably worth cleaning maf sensor.

It usually seen in logs as high fuel trims and large differences in commanded afr and actual afr.

I cannot remember off hand what the front o2 sensor is scaled to but I think its rich max is about 11.3 afr and your afr is flatlining which makes me think that it may actually be richer than 11.3 as the sensor has hit its limit.

This may be the issue, anyhow shiv is going to look at it I believe.

check out your LTFT if its 10% or more indicates problems like exhaust intake leaks dirty maf sensor ect. and your running at least 11.3 or richer when the OL fuel table is about 12.2 to 12.5 from memory.

That tune was actually intended for cat-less header , so the combination of catted header and other exhaust mods may also be contributing.

Yeah its the drop In its oiled . and the Afr the lowest it goes is 11.6

[DustinS]

Originally Posted by Shiv@Openflash

I'll be in LA on Saturday. If you can reproduce what you are describing and show it to me, I'd love to see/log it.

I have it logged. Seems it's not just in 6th for me. Will do it in 4th-6th right around 4000-4500. I'll find it and post it.

Edit: RPM Hang

This is on the 1.60. I have updated to the latest file and it doesn't happen as much, but it does still do it. 93 and e85.

[el-92]

Originally Posted by DustinS

I have it logged. Seems it's not just in 6th for me. Will do it in 4th-6th right around 4000-4500. I'll find it and post it.

Edit: RPM Hang

This is on the 1.60. I have updated to the latest file and it doesn't happen as much, but it does still do it. 93 and e85.

Yeah my friend that tunes Hondas said if I ave it in 6th I'm going to have it in other gears as well .

[phrosty]

Originally Posted by DustinS

I have it logged. Seems it's not just in 6th for me. Will do it in 4th-6th right around 4000-4500. I'll find it and post it.

Edit: RPM Hang

This is on the 1.60. I have updated to the latest file and it doesn't happen as much, but it does still do it. 93 and e85.

Judging by your KC Learned, you've experienced some knock right at that point so it's pulling timing.

[Kodename47]

Originally Posted by phrosty

Judging by your KC Learned, you've experienced some knock right at that point so it's pulling timing.

Not necessarily. Look at the MAFv and load, it drops a fair bit. That could mean a different advance value which would be depicted by the KC learn value drop. Without logging FLKC it's unclear.


What I would be concerned with is why the change is occurring. The throttle doesn't seem to be shutting so it's got to be cam or MAF sensor related.

[ck-GT86]

Originally Posted by el-92

Black engine speed .blue maf .green Afr.

Here's my thread on the issue too:

http://www.ft86club.com/forums/showthread.php?t=80260

.ck

[steve99]

http://datazap.me/u/steve99/e85-200k-learn-155?log=0&data=1-2-3-9&solo=2&zoom=390-720


above is log of my car running oft E85 tune, unmodified and completly stock car , so it does not occurr on all cars

i am now running with catless uel header still no issue on standard oft tune E85.

currently running modified oft E85 tune to suit our high grade guaranteed 85% ethanol pump fuel here , still dont get that issue.

not saying it does not happen but must be some combination of fuel car mods ect that causes it.

[DustinS]

At that point the car only had a filter. Everything else was stock, and on a unmodified e85 tune( it did it once or twice on the 93 tune, but I wasn't on it long enough to record it as a concern) I can't imagine just a filter causing issues? It happens a lot less on the current map. I need to check for updates and try logging a couple more to see if it comes back.