Idle/VE tuning order
Thread Starter
Joined: Jul 2003
Posts: 1,290
Likes: 14
From: Wellesley, MA
Idle/VE tuning order Hey all hows it going..
Had a question for yeah, i've been trying to get my start-up/idle dialed in, but in between waiting for cold starts i was hoping to work on my ve. I loaded up a VE tune tonight to go log and the car oscillated from 800-1200rpm idle and the AFR commanded was 11.1:1 !! Could this be because my RAF isn't dialed in yet or is something else wrong. Could my VE be WAY to rich on start up right now and o2's/maf are just compensating? Heres the log
Thanks for your help
Had a question for yeah, i've been trying to get my start-up/idle dialed in, but in between waiting for cold starts i was hoping to work on my ve. I loaded up a VE tune tonight to go log and the car oscillated from 800-1200rpm idle and the AFR commanded was 11.1:1 !! Could this be because my RAF isn't dialed in yet or is something else wrong. Could my VE be WAY to rich on start up right now and o2's/maf are just compensating? Heres the log
Thanks for your help
Thread Starter
Joined: Jul 2003
Posts: 1,290
Likes: 14
From: Wellesley, MA
i kind of missed the obvious with that statement, i have it in SD as im throwing the po103 code and maf fail is at 0hz... O2's should be off as im in open loop, i guess it has to be my VE throwing it off? but how could it be off so much, and run ok w/my regular tune 
Thread Starter
Joined: Jul 2003
Posts: 1,290
Likes: 14
From: Wellesley, MA
Here's the tune i used for VE tuning aswell as the log of when i tried to get it going. The car has untouched 205 heads and a mid 230's cam with a tad over .600 lift on a 112 lsa. Thanks
Your MAF is still active. Zero out the table. Set the other codes to no MIL. Remember too, that the secondary VE table needs to have the same values as the primary, in each specific line.
The VE tables look pretty much untouched. You can start by multiplying the 400 and 800 columns by .9 and that will get you a little closer. The rest of it looks like you got it set up to SD tune. Do you know how to use your histograms?
PM if you wanna.
The MAF is active in your log too.
The VE tables look pretty much untouched. You can start by multiplying the 400 and 800 columns by .9 and that will get you a little closer. The rest of it looks like you got it set up to SD tune. Do you know how to use your histograms?
PM if you wanna.
The MAF is active in your log too.
Thread Starter
Joined: Jul 2003
Posts: 1,290
Likes: 14
From: Wellesley, MA
zero out the maf/freq table? I thought you just had to set the fail to 0hz. I spot checked the secondary and primary and they looked the same, but i will double check. In terms of histogram use i've been pulling configs off hptuners.. I know its histogram #7 i want for VE.. At first it wasn't working, but thats cause i wasnt logging commanded AFR, which i added. I will double check all those things and let you know how i make out. I will just straight up unplug the maf
Trending Topics
zero out the maf/freq table? I thought you just had to set the fail to 0hz. I spot checked the secondary and primary and they looked the same, but i will double check. In terms of histogram use i've been pulling configs off hptuners.. I know its histogram #7 i want for VE.. At first it wasn't working, but thats cause i wasnt logging commanded AFR, which i added. I will double check all those things and let you know how i make out. I will just straight up unplug the maf
As you make changes to your primary VE, cut and paste the lines you need into the secondary. Copy with labels never works for me for that.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo Thread Starter
Joined: Jul 2003
Posts: 1,290
Likes: 14
From: Wellesley, MA
well i unplugged my maf entirely and im 99% sure my tune is setup correctly for OLSD VE tuning via WB. I did some logs and my fueling was way off across the board, -20. Did the changes then it was lean, did the changes then its rich. I'm still at -10, -15...etc Is this common or am i doing something wrong? I've been making changes to secondary ve only until i get it squared away then i'll do primary, as its a 99 model year car.
My first ve log, and the last one i did. If anyone has any opinions please chime in. I should still see STIT values correct?
My first ve log, and the last one i did. If anyone has any opinions please chime in. I should still see STIT values correct?
well i unplugged my maf entirely and im 99% sure my tune is setup correctly for OLSD VE tuning via WB. I did some logs and my fueling was way off across the board, -20. Did the changes then it was lean, did the changes then its rich. I'm still at -10, -15...etc Is this common or am i doing something wrong? I've been making changes to secondary ve only until i get it squared away then i'll do primary, as its a 99 model year car.
My first ve log, and the last one i did. If anyone has any opinions please chime in. I should still see STIT values correct?
My first ve log, and the last one i did. If anyone has any opinions please chime in. I should still see STIT values correct?
Start over, with your stock tables, do the primary, copy over the lines to the secondary, then repeat.
i have usually found almost all idle issues can be solved with adjusting spark/fuel/raf. I decreased my ve table below 1200 by about 35%, upped the timeing, and ran raf, and the car now idles perfect.
Thread Starter
Joined: Jul 2003
Posts: 1,290
Likes: 14
From: Wellesley, MA
idle isn't my problem at this point, that i have pretty much perfect 
I was just questioning my VE tuning, but it seems i was doing things a bit roundabout.
I already figured out making a secondary ve histogram, that i figured out after cutting pasting every other line the first time.
After one night of playing the car is almost a dream to drive, 100x better than it was.
I was just questioning my VE tuning, but it seems i was doing things a bit roundabout.I already figured out making a secondary ve histogram, that i figured out after cutting pasting every other line the first time.
After one night of playing the car is almost a dream to drive, 100x better than it was.