Open Flash Tablet - OFT TIPS Trick’s & FAQ

[carsebuco]

Originally Posted by steve99

If it turns on when plugged into computer oft is likely ok.


If it wont power up connected to obd port in car make sure the obd plug is in all the way and the other end of cable in oft is in tight.


If still no go the obd port fuse may be blown in car. check you have volts at pin 16 on obd port to chassis ground (or pin 5) should see 12v on pin 16 with ignition on.


also the oft/ofm software does not like usb-3 ports try a usb 2 port
[/IMG]

Lol. Just realized I don't have a meter. Went to base exchange. They don't sell it. Went to firestone - nada. Walmart? Nope. Finally found a friggin Lowes. But wait, it requires a tiny screwdriver to open compartment for battery - which I don't have in car. It's freezing azz outside, and I can't do this anymore tonight. Sigh.

Also, what's the relevancy of the usb 2/3 port for me? Do I have to load anything onto the tablet?

[ImDatSlaya]

Originally Posted by steve99

log commanded AFR instead of Atmospheric pressure.


save a log file with a few minutes of normal driving and a WOT run.


The LTFT looks high positive +15% , which is a bit unusual, if you had residual petrol in tank it would be high negative.


Im suspecting you might have exhaust/intake leak, or your running a petrol tune :-) on E85

I flashed the E85 tune from shiv again just to make sure. First pic is after a rev and second is idle

[steve99]

Originally Posted by ImDatSlaya

Attachment 147183
I flashed the E85 tune from shiv again just to make sure. First pic is after a rev and second is idle

Mate there is definitly something wrong, id say you still jave petrol tune in ecu with e85 in tank, or big exhaust or intake leak.

reflash the e85 tune

[ImDatSlaya]

Originally Posted by steve99

Mate there is definitly something wrong, id say you still jave petrol tune in ecu with e85 in tank, or big exhaust or intake leak.

reflash the e85 tune

I did already. I took it straight from the email they sent me and cleared all my tunes from the OFT. I did a smoke test at work and there's a small leak from the front pipe to overpipe but that's it. 2 things I forgot to mention. I also have the Perrin inlet hose and drop in filter.

Sent from my ONEPLUS A3000 using Tapatalk

[carsebuco]

Update: blown fuse.

Wow.

[steve99]

Originally Posted by ImDatSlaya

I did already. I took it straight from the email they sent me and cleared all my tunes from the OFT. I did a smoke test at work and there's a small leak from the front pipe to overpipe but that's it. 2 things I forgot to mention. I also have the Perrin inlet hose and drop in filter.

Sent from my ONEPLUS A3000 using Tapatalk

inlet hose or drop in filter wont effect maf scaling.


what were the fuel trims like on petrol ?

Also what are the LTFT like through out the rpm range when driving ? are the ltft always high positive even at 3000 rpm and above

best if you log to a file and post it up to www.datazap.me much easier to see

[steve99]

Originally Posted by carsebuco

Lol. Just realized I don't have a meter. Went to base exchange. They don't sell it. Went to firestone - nada. Walmart? Nope. Finally found a friggin Lowes. But wait, it requires a tiny screwdriver to open compartment for battery - which I don't have in car. It's freezing azz outside, and I can't do this anymore tonight. Sigh.

Also, what's the relevancy of the usb 2/3 port for me? Do I have to load anything onto the tablet?

If you ecu calibration id is known to the tablet database then it will build tunes for you, if not it wont and you will need to manually load tunes

Tablets dont play well with usb 3 ports. ok on usb 1/2

see the OFT TIPS link below for more info

[ImDatSlaya]

Originally Posted by steve99

inlet hose or drop in filter wont effect maf scaling.


what were the fuel trims like on petrol ?

Also what are the LTFT like through out the rpm range when driving ? are the ltft always high positive even at 3000 rpm and above

best if you log to a file and post it up to www.datazap.me much easier to see

Unfortunately I'm having screen calibration issues and I can't data log. Already contacted OFP.

Sent from my ONEPLUS A3000 using Tapatalk

[steve99]

Originally Posted by ImDatSlaya

Unfortunately I'm having screen calibration issues and I can't data log. Already contacted OFP.

Sent from my ONEPLUS A3000 using Tapatalk

hmmm i wonder if the screen cal is off by enough to cause the wrong tune to becloaded ie you select whatvlooks like tune 5 but it loads 4 or something

assume you have tried recalibrating sctrren with stylus

[ImDatSlaya]

Originally Posted by steve99

hmmm i wonder if the screen cal is off by enough to cause the wrong tune to becloaded ie you select whatvlooks like tune 5 but it loads 4 or something

assume you have tried recalibrating sctrren with stylus

I tried 2 different kinds and my finger. Still fails.

[ImDatSlaya]

This was from this morning on the highway(average speed 85mph).I did double check and I am on the E85 tune. Im replacing the gasket between the over pipe and front pipe today.

[steve99]

Originally Posted by ImDatSlaya

This was from this morning on the highway(average speed 85mph).I did double check and I am on the E85 tune. Im replacing the gasket between the over pipe and front pipe today.

ok if lftt and afr are good at 3500 area you look like your on the correct tune


looks like the ltft is only high positive at low rpm and idle

this usually indicates an exhaust air leak at or before the front o2 sensor

[guybo]

High positive LTFT at low RPMs but getting less positive with RPM increase is a sign of unmetered air getting into the engine- air leak between the MAF and the intake mani. That looks like a vacuum leak.

At idle your total trim is over 17%, but at 3619 it is near 0. Positive fuel trim means that the engine is requesting more fuel because the car is running lean. Your AFR is running to high (lean) so the engine is protecting itself. A vacuum leak always lets in the same amount of air, the orifice that is leaking doesn't get bigger with RPM and is very constricted. At low RPM there's a lot less air entering the engine so that small amount of air through the vacuum leak is relatively large (relative to the small amount of air entering). But at you increase RPM you also increase the amount of air entering the engine so the vacuum leak becomes relatively smaller to the large amount of air coming in. So the fuel trims need to compensate less at higher RPM.

[steve99]

Originally Posted by guybo

High positive LTFT at low RPMs but getting less positive with RPM increase is a sign of unmetered air getting into the engine- air leak between the MAF and the intake mani. That looks like a vacuum leak.

At idle your total trim is over 17%, but at 3619 it is near 0. Positive fuel trim means that the engine is requesting more fuel because the car is running lean. Your AFR is running to high (lean) so the engine is protecting itself. A vacuum leak always lets in the same amount of air, the orifice that is leaking doesn't get bigger with RPM and is very constricted. At low RPM there's a lot less air entering the engine so that small amount of air through the vacuum leak is relatively large (relative to the small amount of air entering). But at you increase RPM you also increase the amount of air entering the engine so the vacuum leak becomes relatively smaller to the large amount of air coming in. So the fuel trims need to compensate less at higher RPM.

yes for sure intake leak will produce similar symptoms.

with exhaust leak 02 sensor sees fresh air as between exhaust pulses their is low pressure and air can get sucked in , thinks car running lean, adds fuel via fuel trims to compensate. as per intake leak its usually more pronounced at idle and low rpm.