Ace83

iTrader: (6)

the aem fic tunes using manifold pressure right? different condition creates different manifold pressure and on some occasions the manifold pressure could be constantly changing, so if your fuel map isnt smooth then there will be a big jump of afrs from rich to lean.

jjos1

iTrader: (1)

What is the injector pulse set at ?

enjoithis

these problems only occur @ cruise / closed loop

trims are around -22

funny ... i watched the "green box" move around on the map when it does this bounce... not one value is different anywhere it bounces to... Fuel trims are only off from factory ecu by +/- 5%, couldnt get them any closer

Ace83

iTrader: (6)

I think its factory close loop doing that, but it should be that much if the fuel trim arent that far

Mr_Meaty

my fuel trims at idle are closer to -28%...gotta account for the larger injectors, you know...

enjoithis

well ive found that fuel trims dont mean much on the FIC.. its all relative... change your MAF or o2 values, then its all different.. with my map im able to run 0 trim @ 0psi ~ 3500 rpms, where other maps are pushing 60+

Unless your talking about the ECU timming (that you need a scanner to read) then you just have a tuning issue lol

This is harder than i thought... i got the basic ... AFR levels but now these stupid little quirks .... im gonna rip this thing out!

Ace83

iTrader: (6)

^^ thats the hard part with the ecu, you have to mix and match with a lot of values and tables lol

aen

it sounds like the ecu trimming

try pulling the f/ic out and starting hte engine, if it works and runs fine then it's hte f/ic/tune.

enjoithis

im gonna try to get a scanner and see what the trim is and adjust for it.

08superwhite

enjoithis, i have a scanner and that is what i was using to tune mine at idle. my fuel trims at idle were only 0.5% and i was still getting the jumping idle and stalling. when I pulled the timing out it completely stopped. i'm not sure why, and yes it probably is just a band aid. but hey, it works and i'm gonna leave mine that way.

enjoithis

I guess ill try it! stupid electronic throttle.

Also - After a shift it goes lean and sputters.. any suggestions?

kirk212

Hey man. If I were you, I would just take it to NoLimitMotorsports in Medford.....Thats if you have an extra 300-400$ to spare. They do good work there. I got my unichip tuned there and everything is like butter. I do also have a slight rough idle due to the lightened flywheel... but I think thats just the nature of the beast.

enjoithis

I've been to enough tuners who havent been able to do any more than I could.

Plus id like to learn how to tune anyway, that way if anything does change / go wrong I have the ability to fix it (like this for example)

kirk212

No i hear that.... but its not good to be driving around, stalling out all the time either. I know that would drive me insane

enjoithis

I learned to drive so it doesnt stall, just gota downshift untill im almost stopped and im fine, car moving keeps enging running lol

The biggest concern i have now is that it goes lean right after a shift, it sputters alot and its annoying!