Trouble With CalcVET

[joecar]

From your log, looks like you're doing good (VET and VEN are almost the same)...

post a newer tune file and a log from it.

[SLP IROC-Z]

awesome that is great to hear! lol. i will do some more logging soon. I just realized that our gas here in the US, atleast in the northeast is E10. so i guess that means i need to change my stoich afr in the tune. 14.2?

[joecar]

Yes, set B3601 to 14.2 for E10.

[SLP IROC-Z]

ok i am having an issue with the car now. idling the afr will start to creep up to over 20:1 here and there, obviously it starts to run rough but then catches it self and goes right back to where it should be. between 1500-2000rpm tipping into the throttle slightly the afr will shoot up to over 16:1 everytime and the car goes flat then it will shoot down to like 13:1. today it started acting up even worse, i was cruising a few times and felt the car lose power looked over at the wide band and afr was over 24:1!! i pulled over and checked my tune, reprogrammed the lm1 just to make sure. problem still existed so i turned off the trims since i was far from home. it still acted up after that. i ended up unplugging the maf for the hell of it and driving it home and the problem didnt happen once. i noticed from looking at my logs the MAF reading seems eratic, it will be at 10,500 then down to under 10,000, then shoot back up and down. the air flow pid shows eratic to because of this (obviously). its just a stock 85mm maf from a truck and im running an 85mm maf curve. you mentioned before it seemed my maf was doing something wierd around 6000hz im wondering if that has anything to do with this. also my wot afr was very close to my commanded PE in SD mode where before it was alot leaner.

[joecar]

Post logs showing MAF problems...

remove the MAF inspect it, are the elements loose/unsoldered...?

[SLP IROC-Z]

this is the log where you said the maf looked screwy from 5500-6500hz
Log_0011.efi

i shut off the maf today and ran it speed density open loop, ran much better. i was missing alot of low end power and response. did not see it lean out and hesitate at all. and when i modify the VE table im actually seeing a response from the LTFTs that make sense.

[joecar]

this is the log where you said the maf looked screwy from 5500-6500hz
Log_0011.efi

i shut off the maf today and ran it speed density open loop, ran much better. i was missing alot of low end power and response. did not see it lean out and hesitate at all. and when i modify the VE table im actually seeing a response from the LTFTs that make sense.

When your PE enables, your commanded fueling (pid GM.EQIVRATIO) goes lean to EQR 0.88 (this is supported by your wideband showing lean 15.3)...

you have your tunetool set to Lambda units and you are interpreting B3618 as EQR (even tho it says Lambda in the upper right)...

set your tunetool fueling units to EQR and re-do your B3618.

[joecar]

Your PE is commanding lean at any load <-- this is BAD

(looks like your tunetool has swapped Lambda/EQR units)...

in tunetool, go Edit>Properties and set fueling units to EQR, exit tunetool and reopen it,

then go and fix B3618 PE table and B3605 and/or B3647 OLFA table (at load you want to command EQR 1.165)...

remember to save file.

Please do this ^.

[SLP IROC-Z]

ive already done that, that was an old log with a tune i made just for logging, i scrapped it.

[SLP IROC-Z]

heres my most recent logs from the track with a normal tune in it.
track6.efitrack2.efitrack3.efitrack4.efitrack5.efi