Official OpenFlash Tablet FA20 Tuning Tech Discussion Thread

[Jlturner]

I just got my OFT about a week ago and my screen all of a sudden is very bright and white, to the point where I can't read the text on some screens. I played with the brightness, did a screen calibration and nothing has changed it. Its the same when plugged into the car or laptop via USB.

Anyone else seen this before or do I have a dud OFT?

[tracerit]

i get that sometimes, i end up just turning it off and then back on (via my on/off OBD cable but an unplug/replug will work too).

[Jlturner]

Mine is every time now, it worked perfectly for 2 days and now its constantly like this on every screen, the touchscreen works fine but the display is god awful. I've made sure the connection is good, and its the same when plugged into my laptop.

[KoolBRZ]

It's time to reload your stock ROM and send it back to Shiv. That's no ordinary white screen. Shiv might need to send you another one, so you better reload your stock ROM and send it back to Shiv, before your OFT stops working completely.

[solidONE]

Originally Posted by Wayno

Should do the trick.

Why are you setting load limit values so low below 2200rpm? It's it a AT vs MT thing? I'm hitting engine loads beyond 1.2 g/rev at RPMs that low. Not quite sure how this thing works beside that by increasing the value in the field AFRs will become richer with no change to MAF scale. Also changing the load limit under say 2200rpm will effect AFR's in both lower and higher RPM's, not only at 2200rpm. so confusing...

[JB86'd]

Originally Posted by solidONE

Why are you setting load limit values so low below 2200rpm? It's it a AT vs MT thing? I'm hitting engine loads beyond 1.2 g/rev at RPMs that low. Not quite sure how this thing works beside that by increasing the value in the field AFRs will become richer with no change to MAF scale. Also changing the load limit under say 2200rpm will effect AFR's in both lower and higher RPM's, not only at 2200rpm. so confusing...

How does a load limit at 2200rpm affect higher RPM AFR's if load limits are RPM based?

[solidONE]

Originally Posted by JB86'd

How does a load limit at 2200rpm affect higher RPM AFR's if load limits are RPM based?

It just does. I just started playing with these tables.

[steve99]

Originally Posted by JB86'd

How does a load limit at 2200rpm affect higher RPM AFR's if load limits are RPM based?

AFAIK the load limit limits the load value the ecu will use to look up timing fueling vvt timing ect in the tables The load will be limited to the value in the load limit table regardless of what tha actual calculated load limit is.

eg if you go wot at 2000 rpm the calculated load will likely be over 1.4 which is at limit of the tables so without load limits at 2000 rpm wot the ecu would look up very rich fueling and very retarded timing as it would use the actual calcultated load. This is what happens in usa oft stage2 roms as load limits were set at a1.5.

if you set the limits back to what the other oft roms are then load at 2000 rpm is limited to about 0.8 when you go wot at 2000, the ecu now looks up the timing fueling ect using the load value od 0.8 result is less rich fueling and more ignition advance and car no longer boggs down.

[JB86'd]

@steve99 yes but he's saying that changing the load limits at lower rpm are also affecting his higher RPM AFR. I'm also suspecting this because after lowering the load limit at 3600 rpm to .9, and raising the values in my OL maf scale, my entire OL log became leaner..when it should have gotten richer.

[Wayno]

Originally Posted by JB86'd

@steve99 yes but he's saying that changing the load limits at lower rpm are also affecting his higher RPM AFR. I'm also suspecting this because after lowering the load limit at 3600 rpm to .9, and raising the values in my OL maf scale, my entire OL log became leaner..when it should have gotten richer.

It won't change your AFR directly. It may effect your LTFT. It might just be within the margin of error.

[steve99]

Originally Posted by JB86'd

@steve99 yes but he's saying that changing the load limits at lower rpm are also affecting his higher RPM AFR. I'm also suspecting this because after lowering the load limit at 3600 rpm to .9, and raising the values in my OL maf scale, my entire OL log became leaner..when it should have gotten richer.

As @Wayno said it wont effect afr directly, but if your also adjusting your maf scale around 3v as part of your adjustements then this area of the maf scale is what determines the last LTFT band setting and this settind is the one used all the way to redline in open loop so that will effect your fueling.

i think your best getting your maf scaling correct and leave it, then only use the load limits or the Engine Load Compensation table if you have to.

[tracerit]

I've been using the OFT for 7 months now and I have noticed that when I'm running the stage 2 El e85 tune, I would randomly lose the ability to use cruise control. It happens probably once a week and ive never noticed it when I was using the stage 1 El 91 tune.

I have to turn the car off and on to get cruise control back. Are there any settings to stage 2 or e85 specific tunes that would affect cruise control?

[steve99]

Originally Posted by tracerit

I've been using the OFT for 7 months now and I have noticed that when I'm running the stage 2 El e85 tune, I would randomly lose the ability to use cruise control. It happens probably once a week and ive never noticed it when I was using the stage 1 El 91 tune.

I have to turn the car off and on to get cruise control back. Are there any settings to stage 2 or e85 specific tunes that would affect cruise control?

does it throw or log a cel code ?

check the P0420 cel code (cat efficiency) is disabled in tune, if that trips it will disable cruise comtrol

also check P050B is disabled if you have altered post start ignition timing to quieten cold start that code is (post start ignition timiing performance)

[tracerit]

Originally Posted by steve99

does it throw or log a cel code ?

check the P0420 cel code (cat efficiency) is disabled in tune, if that trips it will disable cruise comtrol

also check P050B is disabled if you have altered post start ignition timing to quieten cold start that code is (post start ignition timiing performance)

Nope no cel. I'm running stock stage 2 El e85 tune with a modified maf scale. No other variables. Thr thing is that tat this happens randomly. When I go home form work today cruise control will work again.

I've made a modification to my clutch pedal level but I was on thr stage 1 91 tune the last five months and never had this issue until switching to e85.

Weird. It's barely an inconvenience but I'm just curious.