Quote:
Originally Posted by MGPAX
I'm on a tried and true E85 tune with Wayno's charts and maf. Worked fine for a month or so.
I fueled up at a new station (Very nice part of town) the other day.
And for the past few days I've noticed a lot of bogging. To the point I was manually downshifting to get power.
Plugged the OFT in this morning to check out what was going on:
http://datazap.me/u/mgpaxman/e85-gon...ata=7-10-11-12 (Pick any section)
After some panic, and with a half tank of fuel still I decided the numbers pointed toward some E20 or something instead of E85. And decided the best course of action was to fuel up with 93 and switch over to a Petrol tune.
http://datazap.me/u/mgpaxman/petro-t...zoom=3577-4684
So I guessed right.
Still need to go back to that station and ask them if they have any idea what they are selling!
Pax |
Yep looks like it was petrol or very low E content.
here is how to protect yourself with oft.
Use the tuning alerts or monitor your long term fuel trims if the trims exceed about 10% then you have a problem.
here are the tuning alerts I use with OFT to alert me of any issues
You can have three Alerts and each alert can consist of 4 parameters configured to trigger alarm if All (AND) or one (OR) condition is met.
you need to have any parameter your using as an alert selected in the logging.
Screen will flash and alarm will sound if any of the limits are exceeded.
Alert A (over temperature)
Coolant Temp > 207 F
Oil Temp > 250 F
Select OR at bottom of screen
Alert B ( knock alert & Fuel Trim alert)
For E85 suggest -1 for Petrol may -2
FLKC < -1
Knock Correction < -1
IAM < 0.9
LTFT > +10
LTFT < -10
Select OR at bottom of screen
I set the fuel trim alert as Im on E85 and it will alert me to excessive fuel trims due ethanol content changes or someone accidentally filling up with petrol, it will also alert you of exhaust or intake leaks.
Alert C running lean alert
you might have to tweak AFR for petrol/E85 try 13 for E85 12.5 Petrol
RPM > 5000
Engine Load > 1
AFR > 13
Select AND at bottom of screen
You will need Template 8.2 of later and OFM version 1.21.0 or later