Histogram and speed density VE tuning help
06-16-2014, 11:49 AM
#35
ugh so frustrating, seems that i get it dialed in and everything is going good. Then this morning on the way to work it just seems way off running really rich in some areas lean in others.
Its almost like im fighting some sort of compensation table or something. I did notice that the other day i plugged my laptop into a converter into my acc port and it was messing with voltage, it was making my truck go really lean, i looked on dash and my battery voltage went way down, unplugged it and seemed to go back to normal. So i may have some sort of issue there
I know there is a coolant based comp that should be adding fuel when coolant temp is cold, but it doesnt seem to be doing that. Also i noticed when i put in gear the afr is good but i put it in park and it goes rich
Another thing is from what im told i need to have the DFCO off when doing logging/scanning while im tuning the VE, however when i have DFCO off the truck goes way rich when i let off, so if i lean those cels out then its extremely lean on start up . Anyone know the best way to do this? Ive had it turned on while doing my tuning not sure how much that is affecting me
Its almost like im fighting some sort of compensation table or something. I did notice that the other day i plugged my laptop into a converter into my acc port and it was messing with voltage, it was making my truck go really lean, i looked on dash and my battery voltage went way down, unplugged it and seemed to go back to normal. So i may have some sort of issue there
I know there is a coolant based comp that should be adding fuel when coolant temp is cold, but it doesnt seem to be doing that. Also i noticed when i put in gear the afr is good but i put it in park and it goes rich
Another thing is from what im told i need to have the DFCO off when doing logging/scanning while im tuning the VE, however when i have DFCO off the truck goes way rich when i let off, so if i lean those cels out then its extremely lean on start up . Anyone know the best way to do this? Ive had it turned on while doing my tuning not sure how much that is affecting me
Last edited by timmay208; 06-16-2014 at 12:40 PM.
06-16-2014, 02:17 PM
#37
yea i found that out quick lol.
i turned the DFCO off and going to do some scanning tonight and see what happens. it was great yesterday with good afr at idle, this morning at full op temp it was like high 12's low 13's . seem like when im in park its different than gear to
i turned the DFCO off and going to do some scanning tonight and see what happens. it was great yesterday with good afr at idle, this morning at full op temp it was like high 12's low 13's . seem like when im in park its different than gear to
06-16-2014, 02:32 PM
#38
Welcome to the joys of tuning. Read, read, read. You'll figure it out.
Also, we nearly suffered a fire when I was tuning Andy's truck and i had it plugged into the center console. Too much current draw and melted wires. Don't recommend doing that lol.
Also, we nearly suffered a fire when I was tuning Andy's truck and i had it plugged into the center console. Too much current draw and melted wires. Don't recommend doing that lol.
