I would like to log "Fuel Level" (how much gas in the tank) in evoscan while logging all of the standard EFI items. I see "Fuel Level" listed when OBDII is selected as the ECU list, but not while EFI is selected.

How would I go about adding a data item for Fuel Level while having the "EFI" ECU selected?

I've been looking around trying to figure out what the correct "request" would be, but I don't think I understand enough about where this data is being pulled from at this point to get it on my own.

 

Scaled fuel level is kept at the RAM address FFFF72AA. Its not sent to any MUT addresses though. You'd have to modify the MUT table by inserting 72AB.

 

I did not know you could do this. That is pretty cool.

So we would insert 72AB into a unused MUT table and then log that mrfred?

 

I might be missing something but what is the reason that you would want to log this. (not being rude, this has just struck my curiosity)

 

Would be a cool Evoscan gauge on a LCD screen...

 

Got ya! Thanks Bryan

 

I would assume the address MrFred gave is only for 88590015...

 

exactly. I mounted a 7" touchscreen LCD in front my stock dash and am having it display an evoscan gauge layout with all the important info, but I need a fuel level gauge so I dont run out of gas I'll post some pics.

Thanks for the address mrfred. How did you figure out what address it was? (thats probably a pretty lengthy answer, so if there's any info you could just point me to, I'll try and read up on my own.

 

lol my tanks always empty in my evo8--what gives???!!!!

haha j/k... think its 0xFFFF90A6 on 94170015 EVO 8 (in sub 0x00011AC6) variants so 0xFFFF90A7 for the MUT...correct me if i'm wrong...

EDIT: 0xFFFF9116 on 05 roms (96940011 in sub 0x00011B84). so 0xFFFF9117 for the mut. damn 05 roms suck. never looked at them before. lol. verify?

 

Yep, kinda spaced out the qualifier. :-) Also, I've never logged this so, I have no idea how much it correlates to fuel level on the fuel gauge. It has the potential to be much more accurate, but it all depends on whether the programmers made it accurate. If not, there is a scaling table that we can adjust to make it very accurate.

I forgot to mention that the unscaled fuel level reading is at MUT88. This MUT address is universal for all cars that use fuel level in the ECU (probably USDM only, because fuel level is only used for evap OBD-II tests). It would probably be good to try logging this first.

 

Now the question is if it is the same in 05 ROM alternative ROM 96530006.

 

hell no. lol.

EDIT: does it even care about fuel level/evap stuff?

EDIT2: you can try 0xFFFF90EE/0xFFFF90EF-MUT ...

 

MUT 88 should still give the unscaled fuel level.

 

It would be cool to have it scaled so your gauge tells you how many gallons are left. Easiest way to scale your setup is let it run out of gas at idle one time to see where the level is when the car simply wont run anymore, than top off the tank for the max level. I like this somewhat useless(but cool to have) stuff.

 

96530006 may have the scaled version like the USDM since it does have EGR. This may not be as cool as certain patches, but is still good information on the highway to hacking the ECU. Now about that ACD, ha ha!