Can I run european e85 with USDM OFT tune?

[phrosty]

Originally Posted by Frenatardi

Well yesterday I finally filled with E85, after some miles I pulled over and reflashed. After driving gently more than 35 miles I did some pulls and I saw FLKC at -1.59! It drops negative everytime I'm avove 6700 rpms. I should be worried about that?

How much did you drain the tank before adding E85? Your E% may not be high enough to handle the added timing.

You should also let your high-MAFv LTFT settle before doing any pulls. Doing slow 20% throttle climbs to 5000rpm will help expedite this -- plug in your OFT, if your fuel system goes open loop (4) then you're giving it too much throttle.

[Frenatardi]

Originally Posted by phrosty

How much did you drain the tank before adding E85? Your E% may not be high enough to handle the added timing.

You should also let your high-MAFv LTFT settle before doing any pulls. Doing slow 20% throttle climbs to 5000rpm will help expedite this -- plug in your OFT, if your fuel system goes open loop (4) then you're giving it too much throttle.

When the low fuel light came on I still drove for 20 minutes, it was not totally empty but almost.

Yes, I did 3 slow light steady throttle from 2000 to 6000 before the WOT pulls. But yeah, maybe I should had let the ecu learn the new tune a few miles more.

How much negative FLKC is acceptable?

Thanks for your reply

[steve99]

Originally Posted by Frenatardi

When the low fuel light came on I still drove for 20 minutes, it was not totally empty but almost.

Yes, I did 3 slow light steady throttle from 2000 to 6000 before the WOT pulls. But yeah, maybe I should had let the ecu learn the new tune a few miles more.

How much negative FLKC is acceptable?

Thanks for your reply

Preferavly no negitive flkc or fbkc knock the occasional spike to less than -1 is acceptavle, but if you get consistent knock in an area then best to mod tune slightly. Knock can ve due to several reasons but too much timing or too lean ar main causes

Just post up the link to your datalog in datazap make sure it set to public then we can look at other parameters like ltft and iam and afr to see whats going on

The level of knock you have is acceptable but at get worse with continous hard driving

[Frenatardi]

Originally Posted by steve99

Preferavly no negitive flkc or fbkc knock the occasional spike to less than -1 is acceptavle, but if you get consistent knock in an area then best to mod tune slightly. Knock can ve due to several reasons but too much timing or too lean ar main causes

Just post up the link to your datalog in datazap make sure it set to public then we can look at other parameters like ltft and iam and afr to see whats going on

Ok then, occasionaly less than -1... it seems I'm way off that. I can't wait to go for a drive again and see what happens. Thanks for your help, here is the datalog link.
http://www.datazap.me/u/frenatardi/e...r?log=0&data=1

[steve99]

Originally Posted by Frenatardi

Ok then, occasionaly less than -1... it seems I'm way off that. I can't wait to go for a drive again and see what happens. Thanks for your help, here is the datalog link.
http://www.datazap.me/u/frenatardi/e...r?log=0&data=1

Looks ok fuel trims are good looks like your e85 has arround the 80% or so e content if thats first tank. Its running pretty good afr log commamded afr nex time maybe leve out lateral g.

Keep an eye on the knock their was one bit their -1.5 if that continues id take a little out of the timing map in that are. But do a couple more logs and see if its hapens again

[Frenatardi]

Originally Posted by steve99

Keep an eye on the knock their was one bit their -1.5 if that continues id take a little out of the timing map in that are. But do a couple more logs and see if its hapens again

http://www.datazap.me/u/frenatardi/h...5?log=0&data=1
Flkc keep dropping every time I drive above 6700 rpm. However when cruising and driving normally stays at 0. IAM consistent at 1 all the time.

Here it comes my last question. Should I pay somenone to fix that with custom tunning (assuming I don't know how to do it myself) or maybe I should stop worrying?

Thanks everyone that replied my post. I wish someday I could have enough knowledge to help you guys out.

[steve99]

Originally Posted by Frenatardi

http://www.datazap.me/u/frenatardi/h...5?log=0&data=1
Flkc keep dropping every time I drive above 6700 rpm. However when cruising and driving normally stays at 0. IAM consistent at 1 all the time.

Here it comes my last question. Should I pay somenone to fix that with custom tunning (assuming I don't know how to do it myself) or maybe I should stop worrying?

Thanks everyone that replied my post. I wish someday I could have enough knowledge to help you guys out.

Just needs a litt!e ignition timing pulled at high rpm and maybe a little maf scaling to coresct afr