so starting to tune my and understanding more and more every day it runs and drives pretty well. toning down fuel. but now i have this problem when it warms up. the cars idle hunts(revs up and down) i dont have a bac valve. when this happens the car just runs like crap the whole time doesnt want to run really. any help or advice would be great. no im not putting the bac valve back on

 

when mine starts to hunt it typically mean i have too much of a change inbetween cells of the fuel table. try to smooth out the idle area and it might go away. if you watch the trace on the fuel map and your afr you can see where on the map its going rich or lean and fix it. Mine will typically do clockwise circles around the idle zone, normally i just need to add fuel in the cells below my idle rpm so it doesnt go lean there and start the rev pattern again.

PS. if you haven't already buy the registered version of the software. the VE analyze live feature is very nice and makes tuning soooo easy. well worth the 50 bux when u can do 2 hours of tuning in a drive around the block.

 

so i just register for ve live and then it will help me tune my car better?

 

well yes kinda, i use it as a ballpark. you have to make a good afr map and know what afr you want where, it just does the grunt work of changing the cells slowly as you drive.

EFI Analytics TunerStudio | tunerstudio.com

 

best 50 bucks ever spent! It only tunes the VE table though... which wont help if your WUE/AE etc are 8 kinds of f*cked up!

 

alright thanks for the help and the fast response.

 

Idle is too lean. Probably because you need to add more fuel in the warmup enrichment.